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Genders of generic names

Acknowledgements

The author is very grateful to Dr. B.J. Tindall (DSMZ) and to Dr. N. Weiss (DSMZ) for their helpful comments.

 

Contents:

Introduction

Some examples of genders of generic names or of their last components

• Latin words or Neo-Latin words (mainly of Latin or Greek origin) used as generic names
• Last components in compound generic names of masculine gender
• Last components in compound generic names of feminine gender
• Last components in compound generic names of neuter gender
• Last components in compound generic names of masculine or feminine gender
• Arbitrary names
• Some possible errors

List of generic names in the masculine, feminine or neuter gender

Genders not found or uncertain genders

 

Introduction

• According to Rule 10a, the name of a genus is a substantive, or an adjective used as a substantive, in the singular number and written with an initial capital letter. The name may be taken from any source and may even be composed in an arbitrary manner. It is treated as a Latin substantive.
• Rule 65 of the Bacteriological Code (1990 Revision) states (i) that a Latin or Greek word adopted as a generic name retains the classical gender of its language of origin; (ii) that generic names which are modern compounds from two or more Latin or Greek words take the gender of the last component of the coumpound word; and (iii) that arbitrarily formed generic names or vernacular names used as generic names take the gender assigned to them by their authors.
• An adjective used as a substantive may be in the masculine, in the feminine or in the neuter gender. For example, Rhodoferax is in the masculine gender, Propioniferax is in the feminine gender and Haloferax is in the neuter gender.

A specific epithet or a subspecific epithet, treated as an adjective, must agree in gender with the generic name [Rules 12c and 13b]. For the correct formation of specific and subspecific epithets treated as adjectives, it is therefore necessary to know the gender of the genus name or of its last component.
See the file Latin and neo-Latin adjectives or participle adjectives used as specific or subspecific epithets (J.P. Euzéby & B.J. Tindall).

References:

• LAPAGE (S.P.), SNEATH (P.H.A.), LESSEL (E.F.), SKERMAN (V.B.D.), SEELIGER (H.P.R.) and CLARK (W.A.): International Code of Nomenclature of Bacteria (1990 Revision). American Society for Microbiology, Washington, D.C., 1992.
• MacADOO (T.O.): Nomenclatural literacy. In: M. GOODFELLOW and A.G. O'DONNELL (eds.): Handbook of New Bacterial Systematics, Academic Press, London, 1993, pp. 339-358.
• TRÜPER (H.G.): Help! Latin! How to avoid the most common mistakes while giving Latin names to newly discovered prokaryotes. Microbiología (Sociedad Española de Microbiología), 1996, 12, 473-475. Also available on the Internet.
• TRÜPER (H.G.): How to name a prokaryote? Etymological considerations, proposals and practical advice in prokaryote nomenclature. FEMS Microbiol. Rev., 1999, 23, 231-249.
• TRÜPER (H.G.): Etymology in nomenclature of procaryotes. In: D.R. BOONE, R.W. CASTENHOLZ and G.M. GARRITY (eds.), Bergey's Manual of Systematic Bacteriology, second edition, vol. 1 (The Archaea and the deeply branching and phototrophic Bacteria), Springer-Verlag, New York, 2001, pp. 89-99.

   

  Contents

   

  Some examples of genders of generic names or of their last components

   

  Latin words or Neo-Latin words (mainly of Latin or Greek origin) adopted as generic names

  1) Masculine gender:

  • Amorphus: N.L. masc. n. amorphus from Gr. adj. amorphos, without form, shapeless.
  • Bacillus: L. masc. n. bacillus -i, a small staff.
  • Ensifer: N.L. masc. substantive from L. masc. adj. ensifer, sword-bearing.
  • Inquilinus: L. masc. n. inquilinus -i, an inhabitant of a place which is not his own, a sojourner, tenant, lodger.
  • Labrys: N.L. masc. n. from Gr. masc. n. labrus, two-edged axe, double-headed axe.
  • Meniscus: N.L. masc. n. from Gr. masc. n. mêniskos, lunar crescent.
  • Orbus: L. masc. n. orbus, an orphan.
  • Pectinatus: N.L. masc. substantive from L. masc. adj. pectinatus, combed.
  • Proteus: L. masc. n. Proteus -i, a prophet and god of the sea.
  • Sodalis: L. masc. n. sodalis -is, a companion, comrade, a member of an association.
  • Symbiotes: N.L. masc. n. from Gr. masc. n. sumbiôtês, one who lives with, companion, partner.
  • Syntrophus: N.L. masc. n. from Gr. masc. n. syntrophos, foster brother [one reared in the same house].
  • Thermus: N.L. masc. substantive from Gr. masc. adj. thermos, hot.
  • Vibrio: N.L. masc. n. vibrio, that which moves rapidly, that which vibrates from L. v. vibro to move rapidly to and fro, to vibrate.

  2) Feminine gender:

  a) Genus names formed from personal names (see the file Genus names formed from personal names) are always feminine. Such names may be formed by addition of an ending or a diminutive ending.

• Endings: -a, -ea, -ia, -nia. The ending -ina has also been used by Bermudes et al. 1988 (see Clevelandina, Hollandina, Pillotina).
• Diminutive endings: -ella, -iella, -lla, -nella.
• These endings or diminutive endings are also used to form generic names from names of divinities: Amphritea (Gr. fem. n. Amphrite, a nymph of the ocean in Greek mythology), Demetria (N.L. fem. n. from Gr. n. Dêmêter, Greek female god of agriculture), Eudora (N.L. fem. n., named after Eudora, a sea goddess in Greek mythology), Haliea (N.L. fem. n., named after Halie, a sea nymph in Greek mythology), Hellea (L. fem. n. Helle, a sea goddess in Greek mythology), Melitea (N.L. fem. n. Melitea, named after Melite, a nymph of the sea in Greek mythology),  Nereida (L. fem. n. Nereida, a Nereid, a sea nymph), Pandoraea (N.L. fem. n. from Gr. or L. fem. n. Pandora, a beautiful female, made by Hephaestus, who received presents from all the gods, in order to win the heart of Epimetheus), Persephonella (N.L. fem. n. from Gr. fem. n. Persephonê, a Greek mythological goddess), Telluria (N.L. fem. n. from L. n. Tellus -uris, a Roman goddess of the earth), ...
• For more information, see (i) H.G. Trüper: Help! Latin! How to avoid the most common mistakes while giving Latin names to newly discovered prokaryotes; (ii) Genus names formed from personal names.

b) Other names:


• Aegyptianella: N.L. fem. dim. n. (from L. fem. n. Aegyptus, Egypt), named after Egypt.
• Alysiella: N.L. fem. dim. n. (from Gr. neut. n. halusion, a small chain), a very small schain.
• Ampullariella: N.L. dim. n. (from L. masc. n. ampullarius, a bottle-maker), intended to mean a small bottle.
• Arachnia: N.L. fem. n. from Gr. fem. n. arachnê, a spider.
• Balneatrix: L. fem. n. balneatrix -icis, bather, she who has the care of a bath.
• Balneola: M.L. fem. n. balneola, the ancient name of Banyuls.
• Beutenbergia: N.L. fem. n. Beutenbergia, referring to Beutenberg.
• Brooklawnia: N.L. fem. n. Brooklawnia, referring to Brooklawn.
• Budvicia, N.L. fem. n. Budvicia, referring to Budvicium, the Latin name of the city Ceské Budejovice.
• Centipeda: L. fem. n. centipeda -ae, a centipede, a worm, called also millepeda or multipeda.
• Chlamydia: N.L. fem. dim. n. from Gr. fem. n. chlamus, a short mantle, a military cloak.
• Coenonia: N.L. fem. n. from Gr. fem. n. coenonia, community, association.
• Daeguia: N.L. fem. n. Daeguia, pertaining to Daegu.
• Dokdonella: N.L. fem. n. Dokdonella, named after Dokdo.
• Dokdonia: N.L. dim. fem. n. Dokdonia, named after Dokdo.
• Donghaeana: N.L. fem. n. Donghaeana, named after Donghae, the Korean name of the East Sea in Korea.
• Faenia: L. fem. (sic) pl. (sic) n. Faenia (sic), hays, a genus of prokaryotes associated with hay.
According to Kurup and Agre, the genus name Faenia is a Latin feminine plural name (sic)! However, according to Rule 10a, the name of a genus must be a substantive, or an adjective used as a substantive, in the singular number. Moreover, the Latin noun faenum is in the neuter gender and the plural nominative must be faena (without i).
• Formosa: N.L. fem. substantive from L. fem. adj. formosa, finely formed, beautiful, handsome.
• Gelria: N.L. fem. n. Gelria, referring to Gelre, one of the 12 provinces of The Netherland.
• Gemella: N.L. fem. substantive from L. fem. adj. gemella, twin, double.
• Georgenia: N.L. fem. n. Georgenia, referring to the village St Georgen in Styria.
• Hafnia: N.L. fem. n. from the old name of Copenhagen.
• Legionella: N.L. fem. dim. n. (from L. fem. n. legio, legion, army), a small legion or army.
• Lonepinella: N.L. fem. dim. n. derived from Lone Pine Koala Sanctuary.
• Massilia: L. fem. n. Massilia -ae, Marseille.
• Mitsuaria: L. suff. -arius -a -um, suffix meaning belonging to; N.L. fem. n. Mitsuaria, belonging to Matsue City.
• Nautilia: N.L. fem. n. from Nautile, the name of a French submersible.
• Nereida (= Nereis): L. fem. n. Nereida, a Nereid, a sea nymph.
• Nevskia: N.L. fem. n. Nevskia, referring to Neva, a river in Leningrad.
• Oligella: N.L. fem. dim. n. (from Gr. adj. oligos, little, small), referring to small prokaryote with limited nutritional properties.
• Orientia: N.L. fem. n. from L. n. oriens, the Orient.
• Pantoea: N.L. fem. substantive from Gr. adj. pantoios, of all sorts or kinds or sources, manifold.
• Pirella: N.L. fem. dim. n. (from L. neut. n. pirum, a pear), a small pear.
• Pirellula: N.L. fem. dim. n. (from N.L. fem. dim. n. pirella, a small pear), a very small pear.
• Pragia: N.L. fem. n. Pragia, referring to Prague.
• Reinekea: N.L. fem. substantive derived from Reineke, geographical name of Reineke Island.
• Rickettsiella: N.L. fem. dim. n. (from N.L. fem. n. Rickettsia, a genus of parasitic prokaryotes), a small Rickettsia.
• Runella: N.L. fem. dim. n. (from English noun rune, an ancient alphabet), that which ressembles figures of the runic alphabet.
• Sagittula: L. fem. dim. n. sagittula -ae, a little arrow.
• Sarcina: L. fem. n. sarcina -ae, a package.
• Sejongia: N.L. fem. n. Sejongia, named after the King Sejong Station.
• Serpens: L. fem. n. serpens -tis, a snake.
• Stella: L. fem. n. stella -ae, a star.
• Stigmatella: N.L. fem. dim. n. (from L. n. stigma, a mark burned in, a brand impressed upon slaves or others, as a mark of disgrace), a small brand or mark.
• Tateyamaria: N.L. fem. n. Tateyamaria, belonging to Tateyama City.
• Turicella: N.L. fem. dim. n. (from L. n. Turicum, the Latin name of Zürich, Switzerland), pertaining to Turicum.
• Woodsholea: N.L. fem. n. named in honour of the Woods Hole Oceanographic Institution, Massachusetts, USA.
• Xylella: N.L. fem. dim. n. (from Gr. neut. n. xulon, piece of wood), a small piece of wood.

3) Neuter gender:

• Balnearium: N.L. neut. n. from L. adj. balnearius -a -um, of or pertaining to a bath.
• Chromatium: N.L. neut. n. from Gr. neut. n. chroma -atos, a color, paint.
• Clostridium: N.L. neut. dim. n. (from Gr. n. klôstêr, a spindle), a small spindle.
The L. neut. suffix -ium is sometimes used in bacteriology as a diminutive. However, in Latin, the suffix -ium is generally used to denote a passive quality, a characteristic.
• Crinalium: N.L. neut. dim. n. (from L. adj. crinalis, of hair), a small ?
  The L. neut. suffix -ium is sometimes used in bacteriology as a diminutive. However, in Latin, the suffix -ium is generally used to denote a passive quality, a characteristic.
• Lyticum: N.L. neut. substantive from Gr. adj. lutikos: able to loosen, able to dissolve.
• Spirillum: N.L. neut. dimin. n. spirillum, a small spiral.

 

Last components in compound generic names of masculine gender

• -acidovorax: N.L. masc. n. Acidovorax, a bacterial genus name.
• -adaptatus: N.L. masc. substantive from L. masc. part. adj. adaptatus, adapted to a thing.
• -alcaligenes: N.L. masc. n. Alcaligenes, a bacterial genus name.
• -amator: L. masc. n. amator -oris, a lover, a friend.
• -amorphus: N.L. masc. substantive from Gr. masc. adj. amorphos, without form, shapeless.
• -arculus: N.L. masc. n. arculus, a small bow.
• -arcus: L. masc. n. arcus -us, a bow.
• -ateles: N.L. masc. substantive from Gr. adj. atelês, without end, incomplete, unfinished, imperfect.
• -avidus: N.L. masc. substantive from L. masc. adj. avidus, vehemently desiring, longing for.
• -bacillus: L. masc. n. bacillus -i, a small staff.
• -bacter: N.L. masc. n. bacter, a rod, bacterium, prokaryote; see: Judicial Opinion no. 3.
• -bacteroides: N.L. masc. n. Bacteroides, a generic name.
• -bius: N.L. masc. n. from Gr. masc. n. bios, life.
• -blastus: N.L. masc. n. from Gr. masc. n. blastos, a shoot, bud shoot.
• -borus: N.L. masc. substantive or adj. from Gr. adj. boros, gluttonous.
• -botulus: L. masc. n. botulus -i, an intestine, a sausage.
• -bulbus: L. masc. n. bulbus -i, onion.
• -calculus: L. masc. n. calculus -i, a small stone, pebble.
• -caldus: N.L. masc. substantive from L. masc. adj. caldus, warm, hot.
• -calyx: N.L. masc. n. from Gr. masc. n. kalux, the bud, cup, or calyx of a flower.
• -caulis: L. masc. n. caulis -is, a stalk, stem of a plant.
• -clasticus: N.L. masc. substantive from Gr. adj. klastos, broken in pieces + L. masc. suff. -icus.
• -coccus: N.L. masc. n. from Gr. masc. n. kokkos, a grain, seed.
• -cola: L. masc. (or fem.) abbreviation of L. masc. (or fem.) n. incola -ae, an inhabitant.
• -comes: L. masc. n. comes, a companion.
• -craurococcus: L. masc. n. Craurococcus, a generic name.
• -crinis: L. masc. n. crinis -is, hair.
• -culleus: L. masc. n. culleus -i, a leather bag, a sack for holding liquids.
• -cumulans: L. part. adj. cumulans, accumulating.
• -curvus: N.L. masc. substantive from L. masc. adj. curvus, crooked, curved, bent.
• -cyclus: L. masc. n. cyclus -i, a circle or a cycle, recurring period.
• -desulfatator: N.L. masc. n. desulfatator, sulfate-reducer.
• -discus: L. masc. n. discus -i, a disc.
• -factor: L. masc. n. factor -oris, a maker.
• -fer: N.L. masc. suff. from L. v. fero, to bear, produce.
• -ferax: N.L. masc. substantive from L. masc. adj. ferax, fruitful, fertile, prolific.
• -fex: N.L. masc. suff. from L. v. facio, to make.
• -flexus: L. masc. n. flexus -us, a bending, turning.
• -follis: L. masc. n. follis -is, a leather bag.
• -fractor: L. masc. n. fractor, a breaker.
• -fustis: L. masc. n. fustis -is, a stick, staff, cudgel, club.
• -genes: N.L. masc. suff. from Gr. v. gennaô, to produce, engender.
• -ger: N.L. masc. suff. from L. v. gero, to carry, bear.
• -globus: L. masc. n. globus -i, a round ball, globe, sphere. 
  
• -habitans: L. masc. part. adj. habitans, inhabiting.
• -hopalus: N.L. masc. n. from Gr. masc. n. hopallios, opal (in Latin an opal = opalus).
• -humus: L. masc. n. humus, soil.
• -icanus: N.L. masc. substantive from Gr. adj. hikanos, capable, sufficient, adequate.
• -ianus: L. masc. n. Ianus or Janus, an old Italian deity, represented with two faces looking in opposite directions.
• -incola: L. masc. (or fem.) n. incola -ae, an inhabitant.
• -indiges: N.L. masc. substantive from L. adj. indiges, needy.
• -kineococcus: N.L. masc. n. Kineococcus, name of a genus.
• -labrys: N.L. masc. n. Labrys, name of a genus.
• -lactobacillus: N.L. masc. n. Lactobacillus, name of a genus.
• -liparus: N.L. masc. n. from. Gr. adj. liparos, oily, fat, fatty, greasy.
• -lituus: L. masc. n. lituus, an augur's crook or crosier, a curved trumpet, a crook.
• -lobus: L. masc. n. lobus -i, a lobe.
• -lunatus: N.L. masc. substantive from L. masc. part. adj. lunatus, half-moon-shaped, bent into a crescent.
• -marinus: N.L. masc. substantive from L. masc. adj. marinus, of the sea, marine.
• -murus: L. masc. n. murus -i, a wall, city wall.
• -myces: N.L. masc. n. from Gr. masc. n. mukês -etis, a mushroom, any thing shaped like a mushroom.
• -nauticus: N.L. masc. substantive from L. adj. nauticus -a -um, of a sailor, nautical.
• -nexus: L. masc. n. nexus -us, a binding, tying together, entwining, connecting, a coil (?).
• -oides: L. masc. suff. -oides, from Gr. suff. eides (from Gr. n. eidos, that which is seen, form, shape, figure), ressembling, similar.
• -bacteroides: N.L. masc. n. Bacteroides, name of a genus.
• -pedobacter: N.L. masc. n. Pedobacter, name of a genus.
• -phagus: N.L. masc. n. from Gr. masc. n. phagos, glutton or N.L. masc. substantive from Gr. v. phagein, to eat.
• -philus: N.L. masc. n. from Gr. masc. n. philos, friend or N.L. masc. substantive from Gr. masc. adj. philos, loving.
• -phonus: N.L. masc. n. from Gr. masc. n. phonos, murder, slaughter.
• -piger: N.L. masc. n. from L. masc. adj. piger, lazy, slow, sluggish.
• -planes: N.L. masc. n. from Gr. masc. n. planês, a wanderer, vagabond (warning: the L. masc. n. planes -etis means a wandering star, planet).
• -planus: N.L. masc. substantive from L. masc. adj. planus, flat.
• -proteus: L. masc. n. Proteus -i, a prophet and god of the sea.
• -pulveratus: L. masc. part. adj. pulveratus, bestrewed with dust.
• -pyrus: N.L. masc. (!) n. from Gr. neut. n. pur, a fire.
• -radius: L. masc. n. radius, a rod.
• -reductor: N.L. masc. n. reductor (very rare in classical Latin) one who leads or brings back.
• -ramibacter: N.L. masc. n. Ramibacter, name of a genus.
• -ramulus: L. masc. n. ramulus, a small branch.
• -rhodobacter: N.L. masc. n. Rhodobacter, name of a genus.
• -rubrobacter: N.L. masc. n. Rubrobacter, name of a genus.
• -ruptor: L. masc. n. ruptor -oris, a breaker, violator.
• -salinus: N.L. masc. substantive from N.L. masc. adj. salinus, saline.
• -segetibacter: N.L. masc. n. Segetibacter, name of a genus.
• -serpens: L. masc. n. serpens -tis, a snake.
• -sinus: L. masc. n. sinus -us, a bending, curve fold.
• -sipho or -siphon: L. masc. n. sipho -onis or siphon -onis, a siphon, a kind of fireengine, a little pipe.
• -stipes: L. masc. n. stipes -itis, a log, stump, trunk of a tree, a branch.
• -streptococcus: N.L. masc. n. Streptococcus, name of a genus.
• -teichus: N.L. masc. (!) n. from Gr. neut. n. teichos, a wall.
• -teredinibacter: N.L. masc. n. teredinibacter, name of a bacterial genus.
• -thermus: N.L. masc. substantive from Gr. adj. thermos, hot.
• -tilus: N.L. masc. n. from Gr. masc. n. tilos, anything plucked.
• -torris: L. masc. n. torris -is, fire.
• -truncus: L. masc. n. truncus -i, stick.
• -tutus: N.L. masc. substantive from L. masc. adj. tutus, protected.
• -uncus: L. masc. n. uncus -i, a hook.
• -varius: N.L. masc. substantive from L. masc. adj. varius, manifold, diversified, various, diverse.
• -vermiculus: L. masc. n. vermiculus, a little worm.
• -vibrio: N.L. masc. n. vibrio, that which moves rapidly, that which vibrates from L. v. vibro to move rapidly to and fro, to vibrate; or N.L. masc. n. Vibrio, name of a genus.
• -vivax: N.L. masc. substantive from L. masc. adj. vivax, long-lived, tenacious of life, lasting, enduring.
• -vorans: N.L. masc. substantive from L. part. adj. vorans, devouring.
• -vorax: N.L. masc. substantive from L. masc. adj. vorax, gluttonous, voracious.
• -vorus: N.L. masc. substantive from N.L. masc. adj. vorus, consuming.

 

Last components in compound generic names of feminine gender

• -(a)na: L. fem. suffix used to indicate the geographical origin (for example, Salana, referring to the River Saale in Germany).
• -arcula: L. fem. n. arcula -ae, a small chest or box, a casket.
• -aria: L. fem. suffix meaning belonging to.
• -asaia: N.L. fem. n. Asia, name of a genus.
• -ata: N.L. fem. ending ata, of or pertaining to.
• -baca or -bacca: L. fem. n. baca -ae or bacca -ae, a berry, especially the fruit of the olive.
• -bacula: L. fem. n. bacula -ae, a small berry.
• -bartonella: N.L. fem. n. Bartonella, name of a genus.
• -bifida: N.L. fem. substantive from L. fem. adj. bifida, split into two parts.
• -branca: L. fem. n. branca -ae, a claw, pax, the root of the English word branch.
• -capsa: L. fem. n. capsa -ae, a box.
• -catella: L. fem. n. catella -ae, a small chain.
• -cauda: L. fem. n. cauda -ae, the tail of an animal.
• -cella: L. fem. n. cella -ae, a room.
• -chaeta: N.L. fem. n. from Gr. fem. n. chaitê, long, flowing hair.
• -chlamydia: N.L. fem. n. Chlamydia, name of a genus.
• -chloris: N.L. fem. substantive from Gr. fem. adj. chlora, green.
• -cista: L. fem. n. cista -ae, a chest, box.
• -clava: L. fem. n. clava -ae, stick, staff, cudgel, club.
• -cola: L. fem. (or masc.) abbreviation of L. fem. (or masc.) n. incola -ae, an inhabitant.
• -coniux: L. fem (or masc.) n. coniux, a married person, consort, spouse, husband, wife.
• -corallia: N.L. fem. (!) n. from Gr. neut. n. korallion, coral or from L. neut. n. corallium, coral.
• -curvata: N.L. fem. substantive from L. fem. part. adj. curvata, curved.
• -cytophaga: N.L. fem. n. Cytophaga, name of a bacterial genus.
• -cystis: N.L. fem. n. from Gr. fem. n. kustis, the bladder.
• -derma: N.L. fem. (!) n. from Gr. neut. n. derma, skin.
• -ella: N.L. fem. dim. ending -ella.
• -eggerthella: N.L. fem. n. Eggerthella, name of a genus.
• -eryma: N.L. fem. (!) n. from Gr. neut. n. eruma, a fence, barrier, guard.
• -faba: L. fem. n. faba -ae, a bean.
• -ferax: N.L. fem. substantive from L. fem. adj. ferax, fruitful, fertile, prolific.
• -ferrimonas: N.L. fem. n. Ferrimonas, a bacterial genus name.
• -ferula: L. fem. n. ferula -ae, a stick, cane.
• -forma: L. fem. n. forma -ae, form (in the most comprehensive sense of the word), contour, figure, shape, appearance.
• -glaeba: L. fem. n. glaeba, clump, crumb, aggregate.
• -gloea: N.L. fem. n. from Gr. fem. n. gloia, glue.
• -gulbenkiania: N.L. fem. n. gulbenkiania, name of a genus.
• -hasta: N.L. fem. n. hasta, a staff, rod..
• -ia: L. fem. suffix sometimes used in bacteriology as a diminutive (for example, Chlamydia: N.L. fem. dim. n. from Gr. fem. n. chlamus, a short mantle, a military cloak) or to denote a locality (for example, Beutenbergia, referring to Beutenberg; Budvicia, referring to Budvicium, the Latin name of the city Ceské Budejovice; Gelria, referring to Gelre, one of the 12 provinces of The Netherland; Georgenia, referring to the village St Georgen in Styria; Pragia, referring to Prague...).
• -ichthya: N.L. fem. (!) n. from Gr. masc. n. ichthus, a fish.
• -ina: L. fem. suff. -ina, belonging to.
• -incola: L. fem. (or masc.) n. incola -ae, an inhabitant.
• -kutzneria: N.L. fem. n. Kutzneria, name of a genus.
• -labilia: N.L. fem. substantive from L. fem. adj. labilis, lipping, gliding, prone to slip or slide.
• -lacinia: L. fem. n. lacinia -ae, the lappet, flap, edge.
• -linea: L. fem. n. linea -ae, a linen thread, a string, line.
• -luna: L. fem. n. luna -ae, the moon, a crescent-shaped ornament.
• -madura: N.L. fem. n. from Madura, the name of a province in India.
• -margarita: L. fem. n. margarita -ae, a pearl.
• -marina: L. fem. substantive from L. fem. adj. marina, of the sea, marine.
• -melia: N.L. fem. n. from Gr. fem. n. Meliai, a race of nymphs said to have sprung from the spot of earth on which fell the blood of Uranus.
• -monas: N.L. fem. n. from Gr. fem. n. monas, a unit.
• -moritella: N.L. fem. n. Moritella, name of a genus.
• -morpha: N.L. fem. n. from Gr. fem. n. morphê, form, shape.
• -musa: N.L. fem. n. musa -ae, a banana.
• -myxa: N.L. fem. n. from Gr. fem. n. muxa, slime, mucus.
• -na: see, (a)na.
• -nocardia: N.L. fem. n. Nocardia, name of a genus.
• -nocardiopsis: N.L. fem. n. Nocardiopsis, name of a genus.
• -nutrix: L. fem. n. nutrix -icis, she who nourishes or maintains a thing, a nurse.
• -oerskovia: N.L. fem. n. Oerskovia, name of a genus.
• -oides: L. fem. suff. -oides, from Gr. suff. eides (from Gr. n. eidos, that which is seen, form, shape, figure), ressembling, similar.
• -opsis: N.L. fem. n. from Gr. fem. n. opsis, appearance.
• -oscilla: N.L. fem. (!) n. from L. neut. n. oscillum, a swing.
• -pedia: N.L. fem. n. from Gr. fem. n. pedias, a plain.
• -perlucidibaca: N.L. fem. n. Perlucidibaca, name of a genus.
• -phaga: N.L. fem. substantive from Gr. v. phagein, to eat.
• -phila: N.L. fem. n. from Gr. fem. n. philê, friend or N.L. fem. substantive from Gr. fem. adj. philê, loving.
• -pila: L. fem. n. pila -ae, a ball.
• -pirellula: N.L. fem. n. Pirellula, name of a prokaryotic genus.
• -plana: N.L. fem. n. from Gr. fem. n. planê, a wandering, roaming.
• -planes: N.L. fem. (!) n. from Gr. masc. n. planês, a wanderer, vagabond.
• -ploca: N.L. fem. n. from Gr. fem. n. plokê, a twining, braid, twist.
• -prevotella: N.L. fem. n. Prevotella, name of a genus.
• -pruina: L. fem. n. pruina -ae, hoar-frost, rime.
• -pusillimonas: N.L. fem. n. Pusillimonas, name of a genus.
• -pyxis: N.L. fem. n. from Gr. n. puxis, a box.
• -regula: L. fem. n. regula -ae, a straight piece of wood, ruler, rule.
• -restis: L. fem. n. restis -is, a rope, cord.
• -rhabdus: N.L. fem. n. from Gr. fem. n. rhabdos, a rod, wand.
• -rickettsia: N.L. fem. n.Rickettsia, name of a genus.
• -ruegeria: N.L. fem. n. Ruegeria, name of a genus.
• -saeta: L. fem. n. saeta -ae, a thick, stiff hair.
• -sarcina: L. fem. n. sarcina -ae, a package.
• -scardovia: N.L. fem. n. Scardovia, name of a genus.
• -serpentilla: N.L. fem. n. serpentilla, a small snake.
• -shewanella: N.L. fem. n. Shewanella, name of a genus.
• -sphaera: L. fem. n. sphaera -ae, a globe, sphere.
• -sphaerula: L. fem. n. sphaerula, a small sphere.
• -sphingopyxis: L. fem. n. sphingopyxis, a generic name.
• -spica: L. fem. n. spica -ae, a spike, a tuft.
• -spina: L. fem. n. spina -ae, a thorn.
• -spira: L. fem. n. spira -ae, a coil of a snake, coil, spire, that which is wound, wreathed, coiled, or twisted.
• -spirulina: N.L. fem. dim. n., a small coil from L. fem. n. spirula -ae, a coil.
• -sporia (sic, spelling error): N.L. fem. n. from Gr. fem. n. spora, a seed.
• -spora: N.L. fem. n. from Gr. fem. n. spora, a seed.
• -sporosarcina: N.L. fem. n. Sporosarcina, name of a genus.
• -stega: N.L. fem. n. from Gr. fem. n. stegê, roof, chamber, room, house.
• -sutterella: N.L. fem. n. Sutterella, name of a genus.
• -syntropha: N.L. fem. n. from Gr. fem. n. suntrophê, foster-sister.
• -talea: L. fem. n. talea -ae, a slender staff, rod, stick, stake, bar.
• -tenera: N.L. fem. substantive from L. fem. adj. tenera, delicate
  
• -tepida: N.L. fem. substantive from L. fem. adj. tepida, moderately warm, lukewarm, tepid.
• -terricola: L. fem. n. terricola, a dweller upon earth, a terrestrial.
• -terrigena: L. fem. substantive from L. fem. adj. terrigena, born from the earth.
• -toga: L. fem. n. toga -ae, a covering, garment.
• -tomix: L. fem. n. tomix (or thomix) -icis, a string or thread.
• -thrix: N.L. fem. n. from Gr. fem. n. thrix, hair.
• -trichia: N.L. fem. n. from Gr. fem. n. thrix trichos, hair.
• -tropha: N.L. fem. n. from Gr. n. fem. trophê, nourishment, food.
• -trophia: N.L. fem. n. from Gr. n. fem. trophê, nourishment, food.
• -ula: N.L. fem. dim. ending -ula.
• -vallis: L. fem. n. vallis -is, a vale, valley.
• -venus: L. fem. n. venus, a beauty, grace, elegance.
• -virga: L. fem. n. virga -ae, a green twig, small rod.
• -virgula: L. fem. n. virgula -ae, a little twig, a small rod, a wand.
• -vita: L. fem. n. vita -ae, life.
• -vorans: N.L. fem. substantive from L. part. adj. vorans, devouring.
• -vorax: N.L. fem. substantive from L. fem. adj. vorax, gluttonous, voracious.
• -xanthomonas: N.L. fem. n. Xantomonas, name of a genus.
• -zobellia: N.L. fem. n. Zobellia, name of a genus.

 

Last components in compound generic names of neuter gender

• -acinum: L. neut. n. acinum -i, a berry, esp. the grape, the stone of a berry.
• -actinosynnema: N.L. neut. n. Actinosynnema, a bacterial generic name.
• -angium: L. neut. n. from Gr. neut. n. angeion, vessel for holding liquid or dry substances; of the human or animal body, vessel, cavity.
• -archaeum: N.L. neut. n. archaeum (from Gr. adj. archaios, ancient), archaeon.
• -bacillum: L. neut. n. bacillum -i, a small staff.
• -bacterium: L. neut. n. bacterium -i, a stick, staff.
• -bactrum: N.L. neut. n. from Gr. neut. n. baktron, a stick, cudge.
• -baculum: L. neut. n. baculum -i, a stick, staff.
• -bium: N.L. neut. (!) n. from Gr. masc. n. bios, life.
• -brachium: L. neut. n. brachium -i or bracchium -i, the arm.
• -chromatium: N.L. neut. n. from Gr. neut. n. chroma, a color, paint.
• -caldum: N.L. neut. substantive from L. neut. adj. caldum, warm, hot.
• -chloron: N.L. neut. substantive from Gr. neut. adj. chloron, green.
• -citreum: L. neut. n. citreum, lemon.
• -cladium: N.L. neut. (!) n. cladium from Gr. masc. n. klados, a branch, shoot of a tree.
• -clasticum: N.L. neut. substantive from Gr. neut. adj. klaston, broken in pieces.
• -corpusculum: L. neut. n. corpusculum -i, a little body.
• -crispum: N.L. neut. substantive from L. neut. part. adj. crispum, tightly curled.
• -curvum: N.L. neut. substantive from L. neut. adj. curvum, curved.
• -dictyon: N.L. neut. n. from Gr. neut. n. diktuon, a net.
• -dictium: N.L. neut. n. from Gr. neut. n. diktuon, a net.
• -ellum: L. neut. dim. ending -ellum.
• -ferax: N.L. neut. substantive from L. neut. adj. ferax, fruitful, fertile, prolific.
• -fermentans: N.L. neut. substantive from L. neut. part. adj. fermentans, fermenting.
• -filamentum: L. neut. n. filamentum -i, an assembling of threads.
• -filum: L. neut. n. filum -i, a thread.
• -flexile: N.L. neut. substantive from L. neut. part. adj. flexile, pliant, pliable, flexible.
• -flexum: N.L. neut. substantive from L. neut. adj. flexum, bent, winding.
• -frigus: L. neut. n. frigus -oris: cold, coolness, coldness.
• -genens: N.L. neut. substantive from L. part. neut. adj. genens, producing.
• -generans: N.L. neut. substantive from L. part. neut. adj. generans, producing.
• -genium: N.L. neut. suff. from Gr. v. gennaô, to produce, engender.
• -geometricum: N.L. neut. substantive from L. neut. adj. geometricum, of or belonging to geometry, geometrical.
• -glomus: L. neut. n. glomus -eris, a ball or clue of yarn, thread, etc..
• -granulum: L. neut. n. granulum -i, a small grain.
• -granum: L. neut. n. granum -i, a grain, seed, small kernel.
• -herpeton: N.L. neut. n. from Gr. neut. n. herpeton, beast or animal which goes on all fours, a creeping thing, reptile.
• -ium: L. neut. suffix sometimes used in bacteriology as a diminutive (for example, Clostridium: N.L. neut. dim. n. from Gr. n. klôstêr, a spindle; Crinalium: N.L. neut. dim. n. from L. adj. crinalis, of hair). However, in Latin, the suffix -ium is generally used to denote a passive quality, a characteristic.
• -lyticum: N.L. neut. substantive from Gr. adj. lutikos: able to loosen, able to dissolve.
• -microbium: N.L. neut. n. microbium, microbe.
• -monile: L. neut. n. monile -is, a necklace, collar.
• -natrum: N.L. neut.  n. natrum, from N.L. n. natron, arbitrarily derived from the Arabic n. natrun or natron soda
  
• -nema: N.L. neut. n. from Gr. neut. n. nêma -atos, that which is spun, thread, yarn.
• -nostoc: N.L. neut. n. Nostoc, algal generic name.
• -num: L. neut. suff. to denote a matter.
• -oides: L. neut. suff. -oides, from Gr. suff. eides (from Gr. n. eidos, that which is seen, form, shape, figure), ressembling, similar.
• -oscillum: L. neut. n. oscillum, a swing.
• -ovulum: N.L. neut. dim. n. ovulum, a small egg from L. neut. n. ovum -i, an egg.
• -ovum: L. neut. n. ovum -i, an egg.
• -phanon: N.L. neut. substantive from Gr. neut. adj. phanon, light, bright.
• -philum: N.L. neut. substantive from Gr. neut. adj. philon, loving.
• -plasma: N.L. neut. n. from Gr. neut. n. plasma, anything formed or moulded, image, figure.
• -profundum: L neut n profundum, depth abyss.
• -pyrum: N.L. neut. n. from Gr. neut. n. pur, fire.
• -quadratum: L. neut. n. quadratum, a square.
• -rhabdium: Gr. neut. n. rhabdium, a little rod.
• -rhizobium: N.L. neut. n. Rhizobium, name of a genus.
• -rubrum: N.L. neut. substantive from L. neut. adj. rubrum, red.
• -salsum: N.L. neut. substantive from L. neut. part. adj. salsum, salted, salty.
• -simplex: N.L. neut. substantive from L. neut. adj. simplex, simple, uncomplicated.
• -soma: N.L. neut. n. from Gr. neut. n. soma, body.
• -sphingobacterium: N.L. neut. n. Sphingobacterium, a bacterial genus name.
• -spirillum: N.L. neut. dimin. n. spirillum -i, a small spiral.
• -sporangium: N.L. neut. n. from Gr. fem. n. spora + Gr. neut. n. angeio, a vessel.
• -sporobacterium: N.L. neut. n. Sporobacterium, a generic name.
• -thalassium: N.L. neut. substantive from Gr. adj. thalassaion, of, in, on or from the sea, belonging to it.
• -tignum: L. neut. n. tignum -i, a piece or stick of timber, a trunk of a tree, a log.
• -tomaculum: L. neut. n. tomaculum -i, a kind of sausage.
• -venabulum: L. neut. n. venabulum -i, a huntingspear.
• -verticillium: N.L. neut.(!) n. from L. masc. n. verticillus, whorl, whirl of a spindle.
• -zoon: N.L. neut. n. from Gr. neut. n. zoon, animal.

 

Last components in compound generic names of masculine or feminine gender

• The Latin noun incola (an inhabitant) may be either masculine or feminine. So generic names which end in -incola or -cola (abbreviation of incola) may be in the masculine or in the feminine gender.
For example, Aestuariicola, Alkalilimnicola, Biostraticola, Gallicola, Haloincola, Hwanghaeicola, Marmoricola, Mycetocola, Nitrincola, Pelagicola, Subtercola... are in the masculine gender; Algicola, Echinicola, Glaciecola, Halostagnicola, Litoricola, Marisediminicola, Thermincola ... are in the feminine gender.
• Many other Latin nouns may be either masculine or feminine: advena, alienigena, bos, canis, conviva, dies, exsul (or exul), haeres (or heres), imbrex, lynx, multicolor, myrtus, nasica, parens, rurigena, serpentigena, silvicola, specus, terrigena, umbraticola, unigena, ventricola, verna... However, none of these nouns has been used as the last component of a generic name (-terrigena in Haloterrigena is a feminine adjective).

 

Arbitrary names

• The following arbitrary names are in the feminine gender.
Afipia arbitrarily derived from AFIP (Armed Force Institute of Pathology).
• Basfia arbitrarily derived from BASF SE (a chemical company in Ludwigshafen, Germany)
• Cedecea arbitrarily derived from CDC (Centers for Disease Control).
• Deefgea arbitrarily derived from the acronym DFG for Deutsche Forschungsgemeinschaft (German Science Foundation).
• Demequina arbitrarily derived from demethylmenaquinone.
• Desemzia arbitrarily derived from DSMZ (Deutsche Sammlung von Mikroorganismen und Zellkulturen).
• Emticicia arbitrarily derived from the acronym MTCC (Microbial Type Culture Collection and Gene Bank).
• Iamia arbitrarily derived from the acronym IAM (Institute of Applied Microbiology at the University of Tokyo).
• Kaistella arbitrary derived from KAIST (Korea Advanced Institute of Science and Technology).
• Kaistia arbitrary derived from KAIST (Korea Advanced Institute of Science and Technology).
• Kistimonas arbitrary derived from KIST (Korea Institute of Science and Technology ).
• Kordia arbitrarily derived from KORDI (Korea Ocean Research and Development Institute).
• Kribbella arbitrarily derived from KRIBB (Korean Research Institute of Bioscience and Biotechnology).
• Kribbia arbitrarily derived from KRIBB (Korean Research Institute of Bioscience and Biotechnology).
• Mameliella arbitrarily derived from MME laboratory (Marine microbial ecology laboratory, China).
• Mesonia arbitrarily derived from MES (Marine Experimental Station of the Pacific Institute of Bioorganic Chemistry).
• Niabella arbitrarily derived from NIAB (National Institute of Agricultural Biotechnology).
• Niastella arbitrary derived from NIAST (National Institute of Agricultural Science and Technology).
• Nubsella arbitrary derived from NUBS (Nihon University College of Bioresource Sciences).
• Pibocella arbitrarily derived from PIBOC (Pacific Institute of Bioorganic Chemistry).
• Rikenella arbitrarily derived from RIKEN (Rikagaku Kenkyusho; Institute of Physical and Chemical Research).
• Rudaea arbitrarily derived from RDA (Rural Development Administration).
• Rudanella arbitrarily derived from RDA (Rural Development Administration).
• Sciscionella arbitrarily derived from SCISCIO (South China Sea Institute of Oceanology).
• Stakelama arbitrarily derived from State Key Laboratory of Marine Environment Science.
• Simkania arbitrary name formed from the personal name Simona Kahane.
• Tistrella arbitrarily derived from TISTR (Thailand Institute of Scientific and Technological Reseach).
• Waddlia arbitrarily derived from WADDL (Washington Animal Disease Diagnostic-Laboratory).
• Woodsholea arbitrary name formed from the Woods Hole Oceanographic Institution, Massachusetts, USA.
• Yimella arbitrarily derived from YIM (Yunnan Institute of Microbiology).
• Yokenella arbitrarily derived from Kokuritsu-yoboueisei-kenkyusho (National Institute of Disease Prevention and Health).

• Synergistes (arbitrarily derived from English n. synergist), Methermicoccus (arbitrary name referring to a small, thermophilic, methane-producing coccus), and Cesiribacter (arbitrarily derived for CSIR, Council of Scientific and Industrial Research are in the masculine gender.

 

Some possible errors

1) Generic names assigned to the masculine gender:

• Methanopyrus is in the masculine gender. However, the Greek noun pur (a fire) is in the neuter gender.
• The generic names which end in -teichus are in the masculine gender. However, the Greek noun teichos (a wall of a city) is in the neuter gender. The Greek masculine noun meaning a wall (of a house) is toichos.

2) Generic names assigned to the feminine gender:

• Actinocorallia is in the feminine gender. However, the Greek noun korallion (coral) or the Latin noun corallium (coral) are in the neuter gender.
• Bactoderma is in the feminine gender. However, the Greek noun derma (skin) is in the neuter gender.
• Faenia: According to Kurup and Agre, the genus name Faenia is a Latin feminine plural name (sic)! However, according to Rule 10a, the name of a genus must be a substantive, or an adjective used as a substantive, in the singular number. Moreover, the Latin noun faenum is in the neuter gender and the plural nominative must be faena (without i).
• Spirilliplanes is in the feminine gender. However, the Greek noun planês (a wanderer, vagabond) is in the masculine gender.
• Tropheryma is in the feminine gender. However, the Greek noun eruma (a fence, barrier, guard) is in the neuter gender.
• The generic names which end in -oscilla are in the feminine gender. However, the Latin noun oscillum (a swing) is in the neuter gender.
• Sporichthya is in the feminine gender. However, the Greek noun ichthus (a fish) is in the masculine gender.

3) Generic names assigned to the neuter gender:

• Ancalochloris is in the neuter gender. However, the N.L. subtantive chloris (from Gr. adj. chloros, green) should be in the masculine or in the feminine gender.
• The generic names which end in -bium are in the neuter gender. However, the Greek noun bios (life) is in the masculine gender.
The generic names which end in -microbium, may be considered to be correctly assigned to the neuter gender (N.L. neut. n. microbium, microbe).
• Thermocladium is in the neuter gender. However, the Greek noun klados (a branch, shoot of a tree) is in the masculine gender.
• Streptoverticillium is in the neuter gender. However, the Latin noun verticillus (whorl, whirl of a spindle) is in the masculine gender.

Contents

 

List of generic names in the masculine, feminine or neuter gender

 

Generic names in the masculine gender	Generic names in the feminine gender	Generic names in the neuter gender
Acanthopleuribacter Acaricomes Acetatifactor Acetivibrio Acetobacter Acetothermus Achromobacter Acidaminobacter Acidaminococcus Acidianus Acidicaldus Acidiferrobacter Acidilobus Acidithiobacillus Acidothermus Acidovorax Acinetobacter Actibacter Actinoallomurus Actinoalloteichus Actinobacillus Actinomyces Actinophytocola Actinoplanes Adhaeribacter Aeribacillus Aerococcus Aestuariibacter Aestuariicola Agaricicola Agarivorans: the gender of the genus name is not provided in the paper by Kurahashi and Yokota 2004. However, the epithet of the type species (albus) is in the masculine gender and Agarivorans must be in the masculine gender. Aggregatibacter Agitococcus Agrococcus Agromyces Albibacter Albidiferax Alcaligenes Alcanivorax Algibacter Algiphilus Algoriphagus Aliagarivorans Alicycliphilus Alicyclobacillus Aliivibrio Alistipes Alkalibacillus Alkalibacter Alkaliflexus Alkalilimnicola Alkaliphilus Alkanibacter Alkanindiges Allobacillus Allofustis Alloiococcus Altererythrobacter Alteribacillus Alterococcus Amaricoccus Aminiphilus Aminobacter Ammoniphilus Amoebobacter Ammonifex Amorphus Amphibacillus Amycolicicoccus Anaeroarcus Anaerobacillus Anaerobacter Anaerococcus Anaerofustis Anaeroglobus Anaeromyxobacter Anaerosalibacter Anaerosinus Anaerosporobacter Anaerostipes Anaerotruncus Anaerovibrio Anaerovorax Ancylobacter Aneurinibacillus Angiococcus Angustibacter Anoxybacillus Antarctobacter Aquabacter Aquifex Aquincola Aquipuribacter Aquisalibacillus Archaeoglobus Arcobacter Arcticibacter Arenibacter Arsenicicoccus Arsenophonus Arthrobacter Asaccharobacter Asticcacaulis Atopobacter Atopococcus Atopostipes Auraticoccus Aureibacter Aureicoccus Auritidibacter Azoarcus Azonexus Azorhizophilus Azotobacter Azovibrio Bacillus Bacteroides Bacteriovorax: The gender is not given by Baer et al. 2000. According to Rule 65(1) when the original author failed to indicate the gender, a subsequent author has the right of choice. In 2004, Baer et al. propose the species Bacteriovorax litoralis and Bacteriovorax marinus. The epithets litoralis and marinus are in the masculine gender. Clearly, Baer et al. 2004 choosed the masculine gender for the genus name Bacteriovorax. Bavariicoccus Bdellovibrio Biostraticola Blastobacter Blastococcus Branchiibius Brassicibacter Brevibacillus Bryobacter Butyricicoccus Butyrivibrio Caedibacter Caldalkalibacillus Caldanaerobacter Caldanaerobius Caldibacillus Caldicellulosiruptor Caldicoprobacter Calditerricola Calditerrivibrio Calidifontibacter Caloramator Caloranaerobacter Caminibacter Campylobacter Capsularis Carbophilus Carboxydothermus Caseobacter Catellicoccus Catenococcus Catenuloplanes Caulobacter Celeribacter Cellulosibacter Cellvibrio Cerasibacillus Cerasicoccus Cesiribacter Chelativorans Chelatobacter Chelatococcus Chelonobacter Chitinibacter Chitiniphilus Chitinivorax Chloroflexus Chondromyces Chromatocurvus Chromohalobacter Chryseoglobus Chrysiogenes Citricoccus: The gender is not given by Altenburger et al. 2002. However, according to Rule 65, Citricoccus should be in the masculine gender. Citrobacter Clavibacter Cloacibacillus Clostridiisalibacter Cohaesibacter Conchiformibius Conexibacter Congregibacter Constrictibacter Coprobacillus Coprococcus Coprothermobacter Corallibacter Corallococcus Couchioplanes Craurococcus Croceibacter Croceicoccus Cronobacter Cruoricaptor Cryptanaerobacter Cucumibacter Cupriavidus Curvibacter Cycloclasticus Cystobacter Deferribacter Defluvibacter Defluviicoccus Dehalobacter Deinobacter Deinococcus Dendrosporobacter Denitrovibrio Dermabacter Dermacoccus Dermatophilus Desertibacter Desulfarculus Desulfitibacter Desulfobacter Desulfobotulus Desulfobulbus Desulfococcus Desulfocurvus Desulfofustis Desulfonatronobacter Desulfonatronovibrio Desulfonauticus Desulforhopalus Desulfosporosinus Desulfothermus Desulfovermiculus Desulfovibrio Desulfurivibrio Desulfurococcus Desulfurolobus Dethiobacter Dethiosulfatibacter Dethiosulfovibrio Dialister: The etymology, and therefore the gender, of the genus name Dialister is unknown. According to Rule 65(3), Downes et al. 2003 propose that Dialister be in masculine gender. Diaphorobacter Dichelobacter Dinoroseobacter Diplocalyx: The gender is not given by Bermudes et al. 1988. However, according to Rule 65, Diplocalyx should be in the masculine gender. Dissulfuribacter Dolosicoccus Domibacillus Donghicola Dyadobacter Ectothiorhodosinus Edaphobacter Effluviibacter Empedobacter Endobacter Enhydrobacter Ensifer Enteractinococcus Enterobacter Enterococcus Enterovibrio Eremococcus Erythrobacter Fabibacter Falcivibrio Falsibacillus Falsirhodobacter Ferroglobus Ferrovibrio Ferruginibacter Fervidicoccus Fervidicola Fibrobacter Filibacter Filifactor Filobacillus Flaviflexus Flavihumibacter Flaviramulus Flavisolibacter Flavonifractor Flectobacillus Flexibacter Flexistipes Fluoribacter Fluviicola Fodinibacter Fodinibius Fodinicola Fontibacillus Fontibacter Formivibrio Frondicola Frondihabitans Fulvibacter Fructobacillus Fundibacter Fusibacter Gaetbulibacter Gaetbulicola Galbibacter Gallicola Gelidibacter Geminicoccus Gemmiger Gemmobacter Geoalkalibacter Geobacillus Geobacter Geodermatophilus Geoglobus Geopsychrobacter Geosporobacter Geothermobacter Geovibrio Gilvibacter Gilvimarinus: The gender is not given Du et al. 2009. However, according to Rule 65, the name Gilvimarinus should be in the masculine gender. Glaciibacter Gluconacetobacter Gluconobacter Glycocaulis Glycomyces: The gender is not given by Labeda et al. 1985. However, according to Rule 65, Glycomyces should be in the masculine gender. Gordonibacter Gracilibacillus Gracilibacter Granulibacter Granulicoccus Granulosicoccus Gryllotalpicola Gulosibacter Haematobacter Haemophilus Haladaptatus Halalkalibacillus Halalkalicoccus Halanaerobacter Halarsenatibacter Halioglobus Haliscomenobacter Haloarchaeobius Halobacillus Halobacteroides Halobellus Halococcus Haloglycomyces Haloincola Halolactibacillus Halomethanococcus Halonotius Halopelagius Halopenitus Halopiger Haloplanus Halothiobacillus Halovibrio Halovivax Hasllibacter Helcobacillus Helcococcus Helicobacter Heliobacillus Herpetosiphon Histophilus Humibacillus Humibacter Humicoccus Humihabitans Hwanghaeicola Hydrogenibacillus Hydrogenobacter Hydrogenophilus Hydrogenothermus Hydrogenovibrio Hymenobacter Hyperthermus Ignicoccus Ilumatobacter Ilyobacter Indibacter Inquilinus Iodobacter Isoptericola Janibacter Jatrophihabitans Jeotgalibacillus Jeotgalicoccus Kineococcus Komagataeibacter Koreibacter Krokinobacter Ktedonobacter Kytococcus Labrys Lacibacter Lactobacillus Lactococcus Lactonifactor Lamprobacter Lapillicoccus Laribacter Lentibacillus Lentibacter Leucobacter Limibacter Limnobacter Limnohabitans Litoreibacter Litoribacter Litorisediminicola Luteibacter Luteipulveratus Luteococcus Luteolibacter Lutibacter Lutimaribacter Lysinibacillus Lysobacter Macellibacteroides Macrococcus Magnetococcus Magnetovibrio Mangrovibacter Mangroviflexus Maribacter Maribius Maricaulis Maricurvus Marinibacillus Marinicola Marinilactibacillus Mariniradius Marinithermus Marinobacter Marinococcus Mariprofundus Maritimibacter Marmoricola Mechercharimyces Meiothermus Melghirimyces Melissococcus Meniscus: The gender is not given by Irgens 1977. However, according to Rule 65, Meniscus should be in the masculine gender. Meridianimaribacter Mesoflavibacter Mesophilobacter Methanimicrococcus Methanobrevibacter Methanocalculus Methanocaldococcus Methanococcus Methanoculleus Methanofollis: The gender is not given by Zellner et al. 1999. However, according to Rule 65, Methanofollis should be in the masculine gender. Methanohalophilus Methanolobus Methanomassiliicoccus Methanoplanus Methanopyrus: Methanopyrus is assigned to the masculine gender. However, the Greek noun pur (a fire) is in the neuter gender. Methanothermobacter Methanothermococcus Methanothermus Methanotorris Methermicoccus Methylobacillus Methylobacter Methylococcus Methylohalobius Methylomarinum Methylophilus Methylosinus Methylothermus Methylovorus: The gender is not given by Govorukhina and Trotsenko 1991. However, Methylovorus seems in the masculine gender because the specific epithet glucosotrophus is in the masculine gender. Micavibrio Microaerobacter Microbulbifer Micrococcus Microcyclus Microlunatus Mobilicoccus Mobiluncus Modestobacter Modicisalibacter Mongoliicoccus Morococcus Motilibacter Mucilaginibacter Muricoccus Muriicola Mycetocola Myroides Myxococcus Namhaeicola Natranaerobius Natribacillus Natronobacillus Natronococcus Natronoflexus Natronolimnobius Naxibacter Necropsobacter Negativicoccus Neptuniibacter Nesiotobacter Nitratifractor Nitratireductor Nitratiruptor Nitriliruptor Nitrincola Nitrobacter Nitrococcus Nitrosococcus Nitrosolobus Nocardioides Nonlabens: The gender is not given by Lau et al. 2005. The neo-Latin noun Nonlabens may be in the masculine, in the feminine, or in the neuter gender. The specific epithet of the species proposed by Lau et al. 2005 does not allow the correct gender to be determined. According to Rule 65(3) when the original author failed to indicate the gender, a subsequent author has the right of choice. In 2012, Yi and Chun propose an emendation of the genus Nonlabens and these authors choose the masculine gender. Nosocomiicoccus Oceanibulbus Oceanicaulis Oceanicola Oceanithermus Oceanobacillus Oceanobacter Octadecabacter Odoribacter Oenococcus Oleibacter Oleiphilus Olivibacter Opitutus Orbus Ornithinibacillus Ornithinibacter Ornithinicoccus Oryzihumus Oscillibacter Otariodibacter Oxalobacter Oxalophagus Oxobacter Pacificibacter Paenalcaligenes Paenibacillus Palaeococcus Paludibacter Pannonibacter Papillibacter Parabacteroides Paracoccus Paracraurococcus Paralactobacillus Paralcaligenes Paraliobacillus Parapedobacter Pararhodobacter Parasegetibacter Patulibacter Paucibacter Paucisalibacillus Pectinatus Pediococcus Pedobacter Pelagibacillus Pelagibius Pelagicoccus Pelagicola Pelobacter Pelosinus Peptococcus Peptoniphilus Peptostreptococcus Peredibacter Perexilibacter Persicobacter Petrobacter Phaeobacter Phaeocystidibacter Phaeovibrio Phaseolibacter Phocaeicola Phocoenobacter Phycicoccus Phycicola Phytohabitans Picrophilus Pilibacter Pimelobacter Piscibacillus Piscicoccus Pisciglobus Piscinibacter Planctomyces Planococcus Plantibacter Plasticicumulans Polaribacter Polycladomyces Polynucleobacter Pontibacillus Pontibacter Ponticaulis Ponticoccus Porphyrobacter Porticoccus Primorskyibacter Prochlorococcus Prolinoborus Prolixibacter Propionibacter Propionivibrio Prosthecobacter Proteiniborus Proteus Pseudacidovorax Pseudaminobacter Pseudobutyrivibrio Pseudocaedibacter Pseudoclavibacter Pseudoflavonifractor Pseudofulvibacter Pseudokineococcus Pseudolabrys Pseudoramibacter Pseudorhodobacter Pseudorhodoferax Pseudoteredinibacter Pseudovibrio Pseudoxanthobacter Psychrilyobacter Psychrobacillus Psychrobacter Psychroflexus Psychroserpens: The gender is not given by Bowman et al. 1997. The Latin noun serpens can be in the masculine or in the feminine gender. The specific epithet of the species proposed by Bowman et al. 1997 does not allow the correct gender to be determined. According to Rule 65(3) when the original authors failed to indicate the gender, a subsequent author has the right of choice. In 2006, Kwon et al. propose the species Psychroserpens mesophilus (N.L. masculine adjective). Clearly, Kwon et al. 2006 choosed the masculine gender for the genus name Psychroserpens. Pullulanibacillus Pyramidobacter Pyrococcus Pyrolobus Pyxidicoccus Quadricoccus Quatrionicoccus Ramlibacter Rarobacter Rathayibacter Rhabdothermus Rhizobacter Rhodanobacter Rhodobacter Rhodoblastus Rhodococcus Rhodocyclus Rhodoferax Rhodoglobus Rhodoligotrophos Rhodoplanes Rhodothermus Rhodovarius Rhodovibrio Rivibacter Roseateles Roseibacillus Roseicyclus Roseiflexus Roseinatronobacter Roseisalinus Roseivivax Roseobacter Roseococcus Roseovarius Rubidibacter Rubricoccus Rubrivivax Rubrobacter Rudaeicoccus Ruminobacter Ruminococcus Rummeliibacillus Saccharibacillus Saccharibacter Saccharobacter Saccharococcus Saccharophagus Salegentibacter Salibacillus Salicola Salimesophilobacter Salinibacillus Salinibacter Salinicoccus Salinicola Salinihabitans Salinirepens Salinivibrio Salipiger Salirhabdus Saliterribacillus Salsuginibacillus Sandaracinobacter Sandaracinus Sanguibacter Saxeibacter Sediminibacillus Sediminihabitans Sedimentibacter Sedimenticola Sediminibacter Sediminicola Segetibacter Segniliparus Selenihalanaerobacter Serinicoccus  Silicibacter Sinobacter Sinococcus Smaragdicoccus Sodalis Solibacillus Solirubrobacter Sphaerobacter Sphaerotilus Spongiibacter Sporanaerobacter Sporobacter Sporohalobacter Sporolactobacillus Staphylococcus Staphylothermus Stenothermobacter Stenoxybacter Steroidobacter Stibiobacter Stomatococcus Streptacidiphilus Streptoalloteichus Streptobacillus Streptococcus Streptohalobacillus Streptomyces Stygiolobus Subsaxibacter Subtercola Succinivibrio Sulfitobacter Sulfobacillus Sulfolobus Sulfophobococcus Sulfurococcus Symbiotes Synergistes Syntrophaceticus Syntrophobacter Syntrophobotulus Syntrophococcus Syntrophothermus Syntrophus Tamlicoccus Tectibacter Teichococcus Telmatobacter Tenuibacillus Tepidamorphus Tepidanaerobacter Tepidibacter Tepidiphilus Teredinibacter Terrabacter Terracoccus Terribacillus Terriglobus Tessaracoccus Tetragenococcus Tetrathiobacter Thalassobacillus Thalassobacter Thalassobius Thalassococcus Thalassolituus Thermaerobacter Thermanaerovibrio Thermasporomyces Thermicanus: The gender is not given by Gößner et al. 2000. However, according to Rule 65, Thermicanus should be in the masculine gender. Thermithiobacillus Thermoactinomyces Thermoanaerobacter Thermobacillus Thermobacteroides Thermococcoides Thermococcus Thermocrinis Thermodesulfatator Thermodesulfovibrio Thermodiscus Thermohalobacter Thermolithobacter Thermophagus Thermoproteus Thermosediminibacter Thermosinus Thermosipho Thermosulfidibacter Thermovibrio Thermovorax Thermus Thioalbus Thioalkalibacter Thioalkalicoccus Thioalkalivibrio Thiobacillus Thiobacter Thiococcus Thioflavicoccus Thiohalobacter Thiohalophilus Thiophaeococcus Thioreductor Thiorhodococcus Thiorhodovibrio Trichlorobacter Trichococcus Tropicibacter Tuberibacillus Tumebacillus Turicibacter Ulvibacter Umboniibacter Ureibacillus Vagococcus Vampirovibrio Variovorax Venenivibrio Verminephrobacter Vibrio Virgibacillus Viridibacillus Vitellibacter Volucribacter Vulcanibacillus Vulcanithermus Xanthobacter Xenophilus Xylanibacter Xylophilus Zeaxanthinibacter Zymobacter Zymophilus	Abiotrophia Acidicapsa Acidisphaera Aciditerrimonas Acidocella Acidomonas Acrocarpospora Actinaurispora Actinobispora Actinocatenispora Actinocorallia: The gender is not given by Iinuma et al. 1994 but Actinocorallia seems in the feminine gender because the specific epithets, treated as adjectives, are in the feminine gender (see aurantiaca, glomerata, herbida, libanotica, longicatena). However, the Greek noun korallion (coral) or the Latin noun corallium (coral) are in the neuter gender. Actinokineospora Actinomadura Actinomycetospora Actinopolymorpha Actinopolyspora Actinospica Actinotalea Adlercreutzia Advenella Aegyptianella Aequorivita Aeriscardovia Aeromonas Afifella Afipia Agreia Agromonas Ahrensia Aidingimonas Akkermansia Albimonas Algicola Algimonas Alishewanella Alkalimonas Alkalitalea Aliidiomarina Allisonella Allocatelliglobosispora Allokutzneria Allomonas Allonocardiopsis Alloprevotella Alloscardovia Alpinimonas Alteromonas Alysiella Ameyamaea Aminomonas Amphritea Ampullariella Amycolata Amycolatopsis Anaerobranca Anaerocella Anaerolinea Anaeromusa Anaerophaga Anaerorhabdus Anaerosphaera Anaerovirgula Anderseniella Andreprevotia Aquicella Aquimarina: The gender of the genus Aquimarina is not provided in the article by Nedashkovskaya et al. 2005. According to Rule 65(2) Aquimarina must be in the feminine gender. Aquimonas Aquisalimonas Aquisphaera Aquitalea Arachnia Arcicella Arenicella Arenimonas Arhodomonas Armatimonas Asaia Asanoa Aspromonas Aurantimonas Aureimonas Aureispira Aureitalea Aureivirga Austwickia Azohydromonas Azomonas Azospira Bactoderma: Bactoderma is assigned to the feminine gender. However, the Greek noun derma (skin) is in the neuter gender. Balneatrix Balneimonas Balneola Barnesiella Barrientosiimonas Bartonella Basfia Bauldia Beggiatoa Beijerinckia Belliella Bellilinea Belnapia Beneckea Bergeriella Bergeyella Bermanella Beutenbergia Bhargavaea Bibersteinia Bilophila Bisgaardia Bizionia Blastochloris Blastomonas Blastopirellula Blautia Bogoriella Bordetella Borrelia Bosea Bowmanella Brachymonas Brachyspira Brackiella Branhamella Brenneria Breoghania Brevundimonas Brochothrix Brockia Brooklawnia Brucella Bryantella Bryocella Buchnera Budvicia Bulleidia Burkholderia Buttiauxella Butyricimonas Byssovorax Caenimonas Caldanaerovirga Caldilinea Caldimonas Caldisphaera Caldithrix Caldivirga Camelimonas Caminicella Candidimonas Capnocytophaga Carboxydocella Carnimonas Castellaniella Catalinimonas Catellatospora Catelliglobosispora Catenulispora Catonella Cecembia Cedecea Celerinatantimonas Cellulomonas Cellulophaga Centipeda Chainia Chimaereicella Chitinimonas Chitinophaga Chlamydia Chlamydophila Christensenella Chryseolinea Chryseomonas Chthonomonas Chungangia Citreicella Citreimonas Clevelandina Cobetia Cocleimonas Coenonia Cohnella Collimonas Collinsella Colwellia Comamonas Compostimonas Conglomeromonas Coraliomargarita Corallomonas Cosenzaea Costertonia Cowdria Coxiella Crabtreella Crenothrix Cristispira Croceitalea Crocinitomix Crossiella Cryomorpha Cytophaga Daeguia Dasania Dechloromonas Deefgea Defluviimonas Defluviitalea Defluviitoga Dehalococcoides Dehalogenimonas Deleya Delftia Demequina Demetria Derxia Desemzia Desmospora Desulfatiferula Desulfatitalea Desulfitispora Desulfobacca Desulfobacula Desulfocapsa Desulfocella Desulfofaba Desulfoglaeba Desulfoluna Desulfomonas Desulfomusa Desulfonatronospira Desulfonispora Desulfopila Desulforegula Desulforhabdus Desulfosalsimonas Desulfosarcina Desulfospira Desulfotalea Desulfovirga Desulfovirgula Desulfurella Desulfurispira Desulfurispora Desulfuromonas Desulfuromusa Devosia Devriesea Diaminobutyricimonas Dickeya Dietzia Diplorickettsia Dokdonella Dokdonia Donghaeana Dongia Dorea Duganella Dyella Dysgonomonas Echinicola Echinimonas Ectothiorhodospira Edwardsiella Eggerthella Eggerthia Ehrlichia Eikenella Eilatimonas Eionea Ekhidna Elioraea Elizabethkingia Elstera Emticicia Endozoicomonas Enhygromyxa Enterorhabdus Epilithonimonas Erwinia Erysipelothrix Erythromonas Escherichia Eudoraea Euzebya Euzebyella Ewingella Excellospora Exilispira Extensimonas Facklamia Faenia: According to Kurup and Agre, the genus name Faenia is a Latin feminine plural name (sic)! However, according to Rule 10a, the name of a genus must be a substantive, or an adjective used as a substantive, in the singular number. Moreover, the Latin noun faenum is in the neuter gender and the plural nominative must be faena (without i). Fangia Fastidiosipila Ferrimonas Ferrithrix Fervidicella Fibrella Filimonas Finegoldia Flagellimonas Flammeovirga Flavimonas Flavitalea Flavivirga Flexithrix Flexivirga Flindersiella Fodinicurvata Fonticella Fontimonas Formosa Francisella Frankia Frateuria Friedmanniella Fuchsiella Fulvimarina Fulvimonas Fulvitalea Fulvivirga Fuchsiella Gaiella Galenea Gallaecimonas Gallionella Gangjinia Garciella Gardnerella Gelria Gemella Gemmata Gemmatimonas Georgfuchsia Georgenia Geothrix Geotoga Gibbsiella Giesbergeria Gilliamella Gillisia Glaciecola Glaciimonas Globicatella Goodfellowia Goodfellowiella Gordonia Gracilimonas Grahamella Gramella Granulicatella Granulicella Grimontia Guggenheimella Gulbenkiania Haemobartonella Hafnia Hahella Haliea Hallella Haloactinopolyspora Haloactinospora Haloarcula Halobiforma Halocella Haloechinothrix Haloferula Halolamina Halomarina Halomonas Halorhabdus Halorhodospira Halorientalis Halosarcina Halospina Halospirulina Halostagnicola Halotalea Haloterrigena Halothermothrix Halovenus Hamadaea Hansschlegelia Heliorestis Heliothrix Hellea Henriciella Herbiconiux Herbidospora Herminiimonas Hespellia Hippea Hirschia Hoeflea Holdemania Hollandina Holophaga Holospora Homoserinimonas Hongia Hongiella Howardella Hoyosella Huaishuia Huanghella Humitalea Hydrocarboniphaga Hydrogenimonas Hydrogenivirga Hydrogenophaga Hydrotalea Hylemonella Hyphomonas Hyunsoonleella Iamia Ideonella Idiomarina Ignatzschineria Ignisphaera Imtechella Inhella Isosphaera Jahnella Jannaschia Jejuia Jeongeupia Jhaorihella Jiangella Jishengella Johnsonella Jonesia Jonquetella Joostella Kaistella Kaistia Kandleria Kangiella Kerstersia Kiloniella Kineosphaera Kineosporia Kingella Kinneretia Kistimonas Kitasatoa Kitasatospora Klebsiella Klugiella Kluyvera Knoellia Kocuria Kofleria Kordia Kordiimonas Koserella Kosmotoga Kozakia Krasilnikovia Kribbella Kribbia Kriegella Kroppenstedtia Kurthia Kushneria Kutzneria Kyrpidia Labedaea Labedella Labrenzia Laceyella Lachnospira Lacinutrix Lactosphaera Lamprocystis Lampropedia Larkinella Lautropia Lawsonia Leadbetterella Lebetimonas Lechevalieria Leclercia Leeia Leeuwenhoekiella Legionella Leifsonia Leisingera Leminorella Lentisphaera Lentzea Leptolinea Leptospira Leptothrix Leptotrichia Leucothrix Levilinea Levinea Lewinella Lihuaxuella Limimonas Limnothrix (not validly published) Lishizhenia Listeria Listonella Litoricola Litorilinea Litorimonas Loktanella Lonepinella Longilinea Longispora Lonsdalea Luedemannella Lutaonella Luteimonas Luteivirga Lutimonas Lutispora Lysinimonas Magnetospira Macromonas Mahella Malikia Malonomonas Mameliella Mangrovimonas Mannheimia Marinactinospora Marinicauda Marinicella Marinilabilia Marinitoga Marinivirga Marinomonas Marisediminicola Maritalea Maritimimonas Marivirga Marivita Marixanthomonas Martelella Marvinbryantia Massilia Megamonas Megasphaera Melitea Mesonia Mesotoga Metallosphaera Methanocella Metascardovia Methanolacinia Methanolinea Methanomethylovorans: The gender of the generic name is not provided in the effective publication by Lomans et al. 1999. However, the specific epithet hollandica is an adjective in the feminine gender and Methanomethylovorans must be in the feminine gender. Methanoregula Methanosaeta Methanosarcina Methanosphaera Methanosphaerula Methanothrix Methylarcula Methylocapsa Methylocella Methylocystis: The correct gender of the genus name, feminine gender (not masculine gender as cited by Bowman et al. 1993), was provided by Dedysh et al. 2007. Methyloferula Methylogaea Methylohalomonas Methylomonas Methylophaga Methylopila Methylorhabdus Methylorosula Methylosarcina Methylosphaera Methylotenera Methyloversatilis Methylovirgula Microbispora Microcella Microcystis (not validly published) Microellobosporia Micromonas Micromonospora Micropolyspora Micropruina Microscilla: Microscilla is assigned to the the feminine gender. However, the Latin noun oscillum (a swing) is in the neuter gender. Microsphaera Microterricola Microtetraspora Microvirga Microvirgula Millisia Miniimonas Mitsuaria Mitsuokella Moellerella Mongoliitalea Mooreia Moorella Moraxella Morganella Moritella Moryella Murdochiella Muricauda Murinocardiopsis Mycoplana Nafulsella Nakamurella Nannocystis Natranaerovirga Natrialba Natroniella Natronocella Natronomonas Natronovirga Naumannella Nautella Nautilia Neiella Neisseria Neoasaia Neochlamydia Neokomagataea Neorickettsia Neptunomonas Nereida Nesterenkonia Nevskia Niabella Niastella Nicoletella Nisaea Nitritalea Nitrosomonas Nitrosospira Nitrospina Nitrospira Nocardia Nocardiopsis Nonomuraea Nubsella Oceanicella Oceanimonas Oceaniserpentilla Oceanisphaera Oceanitalea Oceanotoga Oerskovia Ohtaekwangia Oleispira Oligella Oligosphaera Oligotropha Olleya Olsenella Orenia Orientia Ornatilinea Oscillochloris Oscillospira Ottowia Owenweeksia Paenisporosarcina Palleronia Panacagrimonas Pandoraea Pantoea Parachlamydia Paraeggerthella Paraferrimonas Paramoritella Paraoerskovia Paraperlucidibaca Paraprevotella Parapusillimonas Parascardovia Parasphingopyxis Parasutterella Parvimonas Parvularcula Pasteurella Pasteuria Paucimonas Pelagibaca Pelagimonas Pelczaria Pelistega Pelomonas Pelospora Perlucidibaca Persephonella Persicirhabdus Persicitalea Persicivirga Petrimonas Petrotoga Pfennigia Phaselicystis Phorcysia Photorhabdus Phycisphaera Phytomonospora Pibocella Pigmentiphaga Pilimelia Pillotina Pirella Pirellula Piscirickettsia Plantactinospora Planifilum Planktotalea Planktothricoides Planktothrix (not validly published) Planobispora Planomonospora Planopolyspora Planotetraspora Pleomorphomonas Plesiocystis Plesiomonas Polaromonas Polymorphospora Pontibaca Pontimonas Pontirhabdus Porphyromonas Poseidonocella Postechiella Pragia Prauserella Prevotella Pricia Prochlorothrix Profundibacterium Promicromonospora Propionicicella Propioniciclava Propionicimonas Propioniferax: The gender is not given by Yokota et al. 1994. However, Propioniferax seems in the feminine gender because the specific epithet innocua is in the feminine gender. Propionispira Propionispora Prosthecochloris Proteocatella Protomonas Providencia Pseudahrensia Pseudarcicella Pseudenhygromyxa Pseudidiomarina Pseudoalteromonas Pseudoamycolata Pseudoduganella Pseudofulvimonas Pseudogulbenkiania Pseudomonas Pseudonocardia Pseudoruegeria Pseudoxanthomonas Pseudozobellia Psychrosphaera Pusillimonas Psychromonas Quadrisphaera Quinella Rahnella Ralstonia Raoultella Rapidithrix Reichenbachia Reichenbachiella Reinekea Reyranella Rheinheimera Rhizomonas Rhodobaca Rhodocista Rhodocytophaga Rhodopila Rhodopirellula Rhodopseudomonas Rhodospira Rickettsia Rickettsiella Riemerella Rikenella Robiginitalea Robinsoniella Rochalimaea Roseburia Roseibaca Roseivirga Roseomonas Roseospira Rothia Ruania Rubrimonas Rubritalea Rubritepida Rubrivirga Rudaea Rudanella Ruegeria Rugamonas Rugosimonospora Runella Saccharomonospora Saccharopolyspora Saccharothrix Sagittula Salana Salinactinospora Salinarimonas Salinimonas Salinisphaera Salinispora Salisaeta Salmonella Samsonia Sandarakinorhabdus Sandarakinotalea Saprospira Sarcina Scardovia Schineria Schlegelella Schleiferia Schlesneria Schumannella Schwartzia Sciscionella Sebaldella Sediminimonas Sediminitomix Seinonella Sejongia Selenomonas Seliberia Seohaeicola Serinibacter Serpens Serpula Serpulina Serratia Sharpea Shewanella Shigella Shimazuella Shimia Shimwellia Shinella Shivajiella Shuttleworthia Siansivirga Silanimonas Silvimonas Simiduia Simkania Simonsiella Simplicispira Singularimonas Singulisphaera Sinobaca Sinomonas Siphonobacter Skermanella Skermania Slackia Smithella Sneathia Sneathiella Snodgrassella Snuella Soehngenia Solimonas Solitalea Soonwooa Sphaerochaeta Sphingomonas Sphingopyxis Sphingorhabdus Sphingosinicella Spinactinospora Spirilliplanes: Spirilliplanes is assigned to the feminine gender. However, the Greek noun planês (a wanderer, vagabond) is in the masculine gender. Spirillospora Spirochaeta Spongiispira Sporichthya: Sporichthya isassigned to the feminine gender. However, the Greek noun ichthus (a fish) is in the masculine gender. Sporocytophaga Sporolituus Sporomusa Sporosarcina Sporotalea Stackebrandtia Stakelama Staleya Stanierella Stappia Starkeya Stella Stenotrophomonas Stetteria Stigmatella Streptomonospora Succinatimonas Succinimonas Succinispira Sulfuricella Sulfurimonas Sulfurisphaera Sulfuritalea Sulfurivirga Sungkyunkwania Sunxiuqinia Sutterella Suttonella Swaminathania Syntrophomonas Syntrophorhabdus Syntrophospora Tamlana Tannerella Tanticharoenia Tardiphaga Tateyamaria Tatlockia Tatumella Taylorella Telluria Telmatocola Tepidicella Tepidimonas Terasakiella Terrimonas Tetrasphaera Thalassomonas Thalassospira Thauera Thermanaeromonas Thermincola Thermoactinospora Thermobifida Thermobispora Thermocatellispora Thermodesulforhabdus Thermogemmatispora Thermogymnomonas Thermomonas Thermomonospora Thermopolyspora Thermosphaera Thermosporothrix Thermosulfurimonas Thermosyntropha Thermotalea Thermothrix Thermotoga Thermovirga Thioalkalispira Thiobaca Thiocapsa Thioclava Thiocystis Thiofaba Thiohalocapsa Thiohalomonas Thiohalorhabdus Thiohalospira Thiomargarita Thiomicrospira Thiomonas Thiopedia Thioploca Thiorhodospira Thiosphaera Thiospira Thiothrix Thiovirga Thorsellia Tindallia Tissierella Tistlia Tistrella Tolumonas Tomitella Toxothrix Trabulsiella Tranquillimonas Tropheryma: Tropheryma is assigned to the feminine gender. However, the Greek noun eruma (a fence, barrier, guard) is in the neuter gender. Tropicimonas Truepera Trueperella Tsukamurella Turicella Turneriella Umezawaea Uruburuella Vadicella Vasilyevaea Veillonella Verrucosispora Victivallis Vitreoscilla: Vitreoscilla is assigned to the the feminine gender. However, the Latin noun oscillum (a swing) is in the neuter gender. Vogesella Volcaniella Vulcanisaeta Waddlia Wandonia Wautersia Wautersiella Weeksella Weissella Wenxinia Wigglesworthia Williamsia Winogradskyella Wohlfahrtiimonas Wolbachia Wolinella Woodsholea Xanthomonas Xenorhabdus Xiangella Xylanimonas Xylella Yangia Yania Yaniella Yeosuana Yersinia Yimella Yokenella Yonghaparkia Yuhushiella Zavarzinella Zavarzinia Zhangella Zhihengliuella Zhongshania Zhouia Zimmermannella Zobellella Zobellia Zoogloea Zooshikella Zunongwangia Zymomonas	Acetanaerobacterium Acetitomaculum Acetoanaerobium: Acetoanaerobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Acetobacterium Acetofilamentum Acetogenium Acetohalobium: Acetohalobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Acetomicrobium Acetonema Acholeplasma Achromatium Acidimicrobium Acidiphilium Acidiplasma Acidisoma Acidobacterium Actibacterium Actinobaculum Actinopycnidium Actinosporangium Actinosynnema Aeromicrobium Aeropyrum: According to Rule 65(2), the genus name Aeropyrum must be in the neuter gender, not in the masculine gender as cited in the paper by Sako et al. 1996. Aestuariibaculum Aestuariimicrobium Agrobacterium Albidovulum Alkalibacterium Alkalibaculum Alkalispirillum Alloactinosynnema Allobaculum Allochromatium Allorhizobium: Allorhizobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Amantichitinum Aminobacterium Amnibacterium Amorphosporangium Anaerobaculum Anaerobiospirillum Anaerofilum Anaeroplasma Anaplasma Ancalochloris: The etymology is Gr. masc. n. ancalos, arm; Gr. adj. chloros, green; N.L. neut. n. Ancalochloris, arm (-producing) green (microbe). According to rules of Latin and latinization Ancalochloris should be in the masculine or in the feminine gender. Ancalomicrobium Angulomicrobium Anoxynatronum Aquabacterium Aquamicrobium Aquaspirillum Aquiflexum Arcanobacterium Archangium Asteroleplasma Atopobium: Atopobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Aureobacterium Avibacterium Azorhizobium: Azorhizobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Azospirillum Bacteriolyticum (illegitimate) Bacterionema Balnearium Bifidobacterium Blattabacterium Brachybacterium Bradyrhizobium: Bradyrhizobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Brevibacterium Brevinema Brumimicrobium Caenibacterium Caenispirillum Caldisericum Calderobacterium Caldimicrobium Caloribacterium Calymmatobacterium Carboxydibrachium Cardiobacterium Carnobacterium Caryophanon Catellibacterium Catenibacterium Catenovulum Cellulosilyticum Cellulosimicrobium Cetobacterium Chitinilyticum Chlorobaculum Chlorobium: Chlorobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Chloroherpeton Chloronema Chromatium Chromobacterium Chryseobacterium Chryseomicrobium Cloacibacterium Clostridium Coriobacterium Corynebacterium Crinalium (not validly published) Cryobacterium Cryptobacterium Cryptosporangium Curtobacterium Cyclobacterium Dactylosporangium Dechlorosoma Deferrisoma Dehalospirillum Deinobacterium Denitratisoma Denitrobacterium Desulfacinum Desulfatibacillum Desulfatirhabdium Desulfitobacterium Desulfobacterium Desulfobaculum Desulfoconvexum Desulfofrigus Desulfohalobium: Desulfohalobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Desulfomicrobium Desulfomonile Desulfonatronum Desulfonema Desulfosoma Desulfotignum Desulfotomaculum Desulfurispirillum Desulfurobacterium Dichotomicrobium Dictyoglomus Dolosigranulum Elusimicrobium Elytrosporangium Entomoplasma Eperythrozoon Epibacterium Erythromicrobium Ethanoligenens Eubacterium Exiguobacterium Faecalibacterium Ferribacterium Ferrimicrobium Ferroplasma Fervidobacterium Fibrisoma Filomicrobium Fimbriimonas Flavobacterium Fretibacterium Frigoribacterium Fusobacterium Gaetbulimicrobium Gallibacterium Geofilum Geomicrobium Halanaerobaculum Halanaerobium: Halanaerobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Halarchaeum Haliangium Haloactinobacterium Halobacterium Halobaculum Halochromatium Haloferax Halogeometricum Halogranum Halomicrobium Halonatronum Haloplasma Haloquadratum Halorubrobacterium Halorubrum Halosimplex Heliobacterium Heliophilum Herbaspirillum Hyalangium Hydrogenoanaerobacterium Hydrogenobaculum Hyphomicrobium Ignavibacterium Ignavigranum Insolitispirillum Intrasporangium Isobaculum Isochromatium Janthinobacterium Ketogulonicigenium Kibdelosporangium Lachnoanaerobaculum Lachnobacterium Lacticigenium Lactovum Leptobacterium Leptonema Leptospirillum Leuconostoc Litorimicrobium Lucibacterium Luteimicrobium Lutibaculum Lysinimicrobium Lyticum Magnetospirillum Maribaculum Marichromatium Marihabitans Marinifilum Mariniflexile Marinimicrobium Marininema Marinobacterium Marinoscillum Marinospirillum Marinovum Marispirillum Meganema Melittangium Mesoplasma Mesorhizobium: Mesorhizobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Metallibacterium Methanobacterium Methanococcoides Methanocorpusculum Methanogenium Methanohalobium: Methanohalobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Methanomicrobium Methanosalsum Methanospirillum Methylibium: Methylibium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Methylobacterium Methylocaldum Methylomicrobium Methylonatrum Methylosoma Methylovulum Microbacterium Mogibacterium Mucispirillum Myceligenerans: The gender is not given by Cui et al. 2004. However, Myceligenerans must be in the neuter gender because the specific epithet of the type species, Myceligenerans xiligouense, is in the neuter gender. Mycobacterium Mycoplasma Natrinema Natronoarchaeum Natronobacterium Natronorubrum Novispirillum Novosphingobium: Novosphingobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Obesumbacterium Oceanibacterium Oceanibaculum Oceanospirillum Ochrobactrum Okibacterium Oribacterium Oribaculum Ornithinimicrobium Ornithobacterium Oxalicibacterium Paenochrobactrum Paludibacterium Parasporobacterium Parvibaculum Pectobacterium Pedomicrobium Pelagibacterium Pelodictyon Pelotomaculum Phaeochromatium Phaeospirillum Phascolarctobacterium Phenylobacterium Photobacterium Phyllobacterium Planobacterium Planomicrobium Planosporangium Pleomorphobacterium Polyangium Prochloron Propionibacterium Propionigenium Propionimicrobium Prosthecomicrobium Proteiniclasticum Proteiniphilum Pseudochrobactrum Pseudosphingobacterium Pseudospirillum Pseudosporangium Pyrobaculum Pyrodictium Renibacterium Rhabdochromatium Rhizobium: Rhizobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Rhizomicrobium Rhodobium: Rhodobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Rhodomicrobium Rhodonellum Rhodospirillum Rhodothalassium Rhodovulum Robiginitomaculum Roseibacterium Roseibium: Roseibium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Roseicitreum Roseimicrobium Roseospirillum Rubellimicrobium Rubribacterium Saccharofermentans Saccharospirillum Salarchaeum Salimicrobium Salinibacterium Salinimicrobium Salisediminibacterium Sarcobium: Sarcobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Sediminibacterium Sinobacterium Sinomicrobium Sinorhizobium: Sinorhizobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Sinosporangium Solobacterium Sorangium Sphaerisporangium Sphingobacterium Sphingobium: Sphingobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Sphingomicrobium Spirillum Spiroplasma Spirosoma Spongiibacterium Sporacetigenium Sporobacterium Sporosalibacterium Sporotomaculum Sterolibacterium Stomatobaculum Streptosporangium Streptoverticillium: Streptoverticillium is assigned to the neuter gender. However, the Latin noun verticillus (whorl, whirl of a spindle) is in the masculine gender. Subdoligranulum Subsaximicrobium Succiniclasticum Sulfuricurvum Sulfurihydrogenibium: Sulfurihydrogenibium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Sulfurospirillum Sulfurovum Symbiobacterium Telmatospirillum Tenacibaculum Tepidimicrobium Thalassobaculum Thermacetogenium Thermoanaerobacterium Thermoanaerobium: Thermoanaerobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Thermobrachium Thermochromatium Thermocladium: Thermocladium is assigned to the neuter gender. However, the Greek noun klados (a branch, shoot of a tree) is in the masculine gender. Thermocrispum Thermodesulfobium: Thermodesulfobium is assigned to the neuter gender. However, the Greek noun bios (life) is in the masculine gender. Thermodesulfobacterium Thermofilum Thermoflavimicrobium Thermohydrogenium Thermoleophilum Thermomicrobium Thermonema Thermoplasma Thermoterrabacterium Thermovenabulum Thermovum Thioalkalimicrobium Thiobacterium Thiodictyon Thiolamprovum Thioprofundum Thiospirillum Thiovulum Treponema Tychonema (not validly published) Uliginosibacterium Undibacterium Ureaplasma Varibaculum Verrucomicrobium Virgisporangium Xylanibacterium Xylanimicrobium

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Genders not found or uncertain genders

Azomonotrichon The gender is not given by Thompson and Skerman 1981 and the specific epithet of the sole species does not allow the correct gender to be determined. However, according to rules of Latin and latinization, Azomonotrichon should be in the neuter gender.

Natronincola The gender is not given by Zhilina et al. 1999 and the specific epithet of the sole species does not allow the correct gender to be determined. Natronincola may be in the masculine or in the feminine gender. According to Rule 65(1) when the original author failed to indicate the gender, a subsequent author has the right of choice. 

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