Genus names of Greek origin

General remarks

Genus names whose last component is an Ancient Greek noun (or Ancient Greek adjective treated like a noun) obtain their gender from the gender of that noun [Rule 65 (1), Rule 65 (2)]. A list of genus names formed in that manner is provided below, together with the gender of the terminal Ancient Greek noun. For instance, it should be noted that nouns of Greek origin ending in -ma are neuter and declined according to the third declension while Latin nouns ending in -a are usually feminine and belong to the first declension.
Names with Ancient Greek components in other positions are not listed here. The list neither includes names whose last component is a Neolatin word that was strongly modified compared to the original Ancient Greek word from which it was derived, particularly if this modification affected the gender. (Thus bacter, which is masculine, and bacterium, which is neuter, are not listed.) The list includes names with minor modifications, which are shown in parentheses after the Ancient Greek original. See also the LPSN introductory page on forming names.

allâs (allas) — ἀλλᾶς

Gender: masculine

Examples: Desulfallas

angeîon (angium) — ἀγγεῖον

Gender: neuter

Examples: ActinosporangiumAmorphosporangiumArchangium"Asiosporangium"CryptosporangiumDactylosporangiumElytrosporangiumHaliangium"Haploangium"HyalangiumIntrasporangiumKibdelosporangiumMelittangiumPlanosporangiumPolyangiumPseudosporangiumSinosporangiumSorangiumSphaerisporangium corrig.StreptosporangiumVirgisporangium corrig.Vitiosangium

baktron (bactron) — βάκτρον

Gender: neuter

Examples: Geitleribactron

baktron (bactrum) — βάκτρον

Gender: neuter

Examples: KineobactrumMarinibactrumOchrobactrum[Paracolobactrum]

baktron — βάκτρον

Gender: neuter

Examples: Myxobaktron

bios (bius) — βίος

Gender: masculine

Examples: AestuariibiusBranchiibiusCaenibiusCaldanaerobiusConchiformibius corrig.FodinibiusHaloarchaeobiusMaribiusMethylohalobiusNatranaerobiusNatrarchaeobiusNatronolimnobiusPelagibiusSalinibiusThalassobius[Thiobius]

blastos (blastus) — βλαστός

Gender: masculine

Examples: MariniblastusRhodoblastus

boros (borus) — βορός

Gender: masculine

Examples: ProlinoborusProteiniborus

botrys — βότρυς

Gender: masculine

Examples: Cyanobotrys

chaitê (chaeta) — χαίτη

Gender: feminine

Examples: PleomorphochaetaSphaerochaetaSpirochaeta

chaitê (chaete) — χαίτη

Gender: feminine

Examples: CalochaeteMacrochaeteMicrochaetePhormidiochaeteThiochaete

chlôris (chloris) — χλωρίς

Gender: feminine

Examples: AcaryochlorisAncalochlorisBlastochloris[Clathrochloris][Coccochloris]OscillochlorisProsthecochloris

dapis — δάπις

Gender: feminine

Examples: Dapis

derma — δέρμα

Gender: neuter

Examples: BactodermaCyanodermaPhyllodermaRhabdoderma

diktyon (dictyon) — δίκτυον

Gender: neuter

Examples: CyanodictyonPelodictyonThiodictyon

Echidna (Ekhidna) — Ἔχιδνα

Gender: feminine

Examples: Ekhidna

eryma — ἔρυμα

Gender: neuter

Examples: Tropheryma"Tropheryma"

gloia (gloea) — γλοία

Gender: feminine

Examples: ChalicogloeaChlorogloeaChondrogloeaDasygloeaRhabdogloea[Troglogloea]Zoogloea

herpeton — ἑρπετόν

Gender: neuter

Examples: Chloroherpeton

hormos (ormus) — ὅρμος

Gender: masculine

Examples: Trichormus

ichthya — ἰχθύα

Gender: feminine

Examples: Sporichthya

kladion (cladium) — κλάδιον

Gender: neuter

Examples: Thermocladium

klôstêr (closter) — κλωστήρ

Gender: masculine

Examples: Enterocloster

koleon (coleum) — κολεόν

Gender: neuter

Examples: HydrocoleumSirocoleum

korynê (coryne) — κορύνη

Gender: feminine

Examples: Hydrocoryne

korys (corys) — κόρυς

Gender: feminine

Examples: Myxacorys"Myxocorys"

kyklikos (cyclicus) — κυκλικός

Gender: masculine

Examples: Hypnocyclicus

kystis (cystis) — κύστις

Gender: feminine

Examples: AnacystisChondrocystis"Chroogloeocystis"CyanocystisDiplocystisGeminocystisIsocystisLamprocystisMethylocystisMicrocystisMinicystisNannocystisPhaselicystisPlesiocystisPolycystisRacemicystisRadiocystisSynechocystisThiocystis

lemma — λέμμα

Gender: neuter

Examples: Chroakolemma

liparos — λιπαρός

Gender: masculine

Examples: Segniliparus

moron — μόρον

Gender: neuter

Examples: Coelomoron

mykês (myces) — μύκης

Gender: masculine

Examples: ActinomycesAgromycesChondromycesGlycomycesHaloactinomyces[Malleomyces]MechercharimycesMelghirimycesMzabimyces"Odontomyces"Paenactinomyces"Parastreptomyces"PlanctomycesPolycladomycesStreptomycesTenggerimycesThermasporomycesThermoactinomyces

myxa — μύξα

Gender: feminine

Examples: EnhygromyxaLithomyxa

Naias (naias) — Ναϊάς

Gender: feminine

Examples: Spelaeonaias

nêma (nema) — νῆμα

Gender: neuter

Examples: AcetonemaAchroonemaActinosynnemaAerosakkonemaAlkalinemaAmazoninemaAnagnostidinemaArthronemaBacterionemaBrasilonemaBrevinemaCalenemaChloronemaColteronemaDesulfonema"Candidatus Electronema"GeitlerinemaHalomicronemaHerpyzonemaHormathonemaIningainemaJaaginemaJohanseninemaKamptonemaKlisinemaKoinonemaLaspinemaLeptonemaLetestuinemaMarininemaMeganemaNatrinemaNeomegalonemaOnkonemaOxynemaPantanalinemaPersinemaPetalonemaPhyllonemaPlectonemaPseudoscytonemaPycnacronemaRectinemaRhizonemaSacconemaSalininemaScytonemaSiphononemaSodalinema[Sphaeronema]StauromatonemaStigonemaSymphyonemaThermonemaTreponemaTryponemaTychonema

Nisaia (Nisaea) — Νίσαια

Gender: feminine

Examples: Nisaea

opsis — ὄψις

Gender: feminine

Examples: AmycolatopsisAnabaenopsisBrachytrichiopsisCamptylonemopsisChamaesiphonopsisChlorogloeopsisChroococcidiopsisChroococcopsisCoelosphaeriopsis"Coleospermopsis"CylindrospermopsisFischerellopsisGloeocapsopsisLoriellopsisLyngbyopsisMastigocladopsisMastigocoleopsisMycoplasmopsisNocardiopsisNostochopsisRaphidiopsis[Scytonematopsis]SphaerospermopsisSymphyonemopsis"Tolypothrichopsis"ToxopsisWestiellopsis

pepsis — πέψις

Gender: feminine

Examples: Micropepsis

phagos (phagus) — φάγος

Gender: masculine

Examples: AlgoriphagusOxalophagusSaccharophagusSaliphagusThermophagus

phasêlos (phaselus) — φάσηλος

Gender: masculine

Examples: Ferriphaselus

phonos (phonus) — φόνος

Gender: masculine

Examples: Arsenophonus

physalis — φυσαλίς

Gender: feminine

Examples: Entophysalis

planês (planes) — πλάνης

Gender: masculine

Examples: ActinoplanesBacterioplanesCatenuloplanesCouchioplanesDesulfoplanesRhodoplanesSpirilliplanes

plasma — πλάσμα

Gender: neuter

Examples: AcholeplasmaAcidiplasmaAnaeroplasmaAnaplasmaAsteroleplasma"Candidatus Bacilloplasma"Cuniculiplasma"Edwardiiplasma"EntomoplasmaFerroplasmaHaloplasma[Hepatoplasma]MalacoplasmaMesoplasma[Methanoplasma][Moeniiplasma]Mycoplasma"Candidatus Phytoplasma""Pluraplasma"SpiroplasmaThermoplasma"Tullyiplasma"Ureaplasma[Vermiplasma]Williamsoniiplasma

plokê (ploca) — πλοκή

Gender: feminine

Examples: [Marithioploca]"Peloploca"SymplocaThioploca

pôgôn (pogon) — πώγων

Gender: masculine

Examples: Spelaeopogon

Prôteus (Proteus) — Πρωτεύς

Gender: masculine

Examples: Proteus

pygê (pyga) — πυγή

Gender: feminine

Examples: Kallipyga

pŷr (pyrum) — πῦρ

Gender: neuter

Examples: Aeropyrum

pyxis — πυξίς

Gender: feminine

Examples: Sphingopyxis

rhabdion (rhabdium) — ῥαβδίον

Gender: neuter

Examples: Desulfatirhabdium

rhabdos (rhabdus) — ῥάβδος

Gender: feminine

Examples: AestuariirhabdusAnaerorhabdusBrevirhabdusDesulforhabdusDissulfurirhabdusEdaphorhabdusEnterorhabdusFlavirhabdusHalorhabdusIntestinirhabdusLongirhabdusMarinirhabdusMethylorhabdusOceanirhabdusPaludirhabdusPelagirhabdusPersicirhabdusPhotorhabdusPontirhabdusRhizorhabdusSalirhabdusSandarakinorhabdusSphingorhabdusSulfurirhabdusSyntrophorhabdus"Tellurirhabdus"Thalassorhabdus"Thalassorhabdus"ThermodesulforhabdusThiohalorhabdusThiomicrorhabdusXenorhabdus

rhaphis (raphis) — ῥαφίς

Gender: feminine

Examples: Limnoraphis

rhapis — ῥαπίς

Gender: feminine

Examples: Rhizorhapis

seira — σειρά

Gender: neuter

Examples: Microseira

seira (sira) — σειρά

Gender: neuter

Examples: AulosiraCapsosira

siphôn (siphon) — σίφων

Gender: masculine

Examples: ChamaesiphonHapalosiphonHerpetosiphonPorphyrosiphonPotamosiphon

sôma (soma) — σῶμα

Gender: neuter

Examples: AcidisomaDechlorosomaDeferrisomaDenitratisomaDesulfosomaFibrisomaMethylosomaSpirosomaSulfurisoma

speîra (spira) — σπεῖρα

Gender: feminine

Examples: AestuariispiraArthrospiraAureispiraAzospiraBrachyspiraCristispira"Cyanospira"DesulfonatronospiraDesulfospiraDesulfurispiraEctothiorhodospiraExilispira"Flexispira"FluviispiraGlaucospiraHalorhodospiraLachnospiraLeptospiraLimnospiraMagnetospira[Magnispira]"Candidatus Maribrachyspira"NatronospiraNitrosospiraNitrospiraOleispiraOscillospiraPropionispiraRhodospiraRoseospiraSalinispiraSaprospiraSimplicispiraSpongiispiraSuccinispiraTerasakiispiraThalassospiraThioalkalispiraThiohalospiraThiomicrospiraThiorhodospiraThiospira

sphaîra (sphaera) — σφαῖρα

Gender: feminine

Examples: AcidisphaeraAlgisphaeraAnaerohalosphaeraAnaerosphaeraAquisphaeraAureisphaeraCaldisphaeraCatenisphaera"Conexivisphaera"Crocosphaera"Diplosphaera"EpigloeosphaeraGeminisphaera[Halyseosphaera]IgnisphaeraIsosphaeraKineosphaeraLactosphaera"Lacunisphaera"LentisphaeraLimisphaera[Limnosphaera]MegasphaeraMetallosphaeraMethanosphaeraMethylosphaeraMicrosphaeraNitrososphaeraOceanisphaeraOligosphaeraPaludisphaeraPhycisphaeraPsychrosphaeraQuadrisphaeraRubinisphaeraSalinisphaeraSedimentisphaeraSingulisphaeraSiphonosphaeraSulfurisphaeraTepidisphaeraTetrasphaeraThermosphaeraThiosphaeraTundrisphaera"Zestosphaera"

sphaîra (sphaeria) — σφαῖρα

Gender: feminine

Examples: Gomphosphaeria

spora — σπορά

Gender: feminine

Examples: AcrocarposporaActinaurisporaActinobisporaActinocatenisporaActinokineosporaActinomycetosporaActinopolysporaActinorectisporaActinorhabdosporaActinorugisporaAnaerosporaAsaccharosporaCatellatosporaCatelliglobosisporaCatenulisporaDesertactinospora corrig.DesmosporaDesulfitisporaDesulfonisporaDesulfurisporaExcellosporaHaloactinopolysporaHaloactinosporaHalopolysporaHerbidosporaHolosporaHolosporaHydrogenisporaKitasatospora corrig.LacrimisporaLongisporaLutisporaMarinactinospora"Marinispora"MarinitenerisporaMicrobisporaMicromonosporaMicropolysporaMicrotetraspora"Parvopolyspora"PelosporaPhytoactinopolysporaPhytomonosporaPlanobisporaPlanomonosporaPlanopolysporaPlanotetrasporaPlantactinosporaPolymorphosporaPropionisporaRugosimonosporaSaccharomonosporaSaccharopolysporaSalinactinosporaSalinisporaSphaerimonosporaSpinactinosporaSpirillosporaSpongiactinosporaStaphylosporaStreptomonospora corrig.SyntrophosporaThermoactinosporaThermobisporaThermocatellisporaThermogemmatisporaThermomonosporaThermopolysporaThermostaphylosporaVerrucosispora

stegê (stega) — στέγη

Gender: feminine

Examples: Pelistega

stêmôn (stemon) — στήμων

Gender: masculine

Examples: Streptostemon

stichos (stichus) — στίχος

Gender: masculine

Examples: Rhodostichus

thamnos — θάμνος

Gender: masculine or feminine

Examples: CyanothamnosDactylothamnos

thêkê (thece) — θήκη

Gender: feminine

Examples: AnatheceAphanotheceCyanothece[Euhalothece]GloeotheceHalotheceHormothece[Thiothece]

thermos (thermus) — θερμός

Gender: masculine

Examples: AcetothermusAcidothermusCarboxydothermusDesulfothermusHydrogenothermusHyperthermusMarinithermusMeiothermusMethanothermusMethylothermus"Methylothermus"OceanithermusRhabdothermusRhodothermusRoseithermusStaphylothermusSyntrophothermusThermusVulcanithermus

tholos — θόλος

Gender: masculine or feminine

Examples: Xenotholos

thrix — θρίξ

Gender: feminine

Examples: "Acidithrix"AmphithrixAncylothrixBlennothrixBrochothrixCaldithrixCalorithrixCalothrixCephalothrixChamaethrixCrenothrixCuspidothrixDichothrix"Candidatus Electrothrix"ErysipelothrixFerrithrixFlexithrixGeothrixHaloechinothrixHalothermothrixHeliothrixHomoeothrixKineothrixKyrtuthrixLabilithrixLeptothrixLeucothrixLimnothrix[Marithrix]Methanothrix[Neomicrothrix]OphiothrixPegethrixPlanktothrixProchlorothrixProterendothrixRapidithrixSaccharothrixSalinithrixSchizothrix"Candidatus Symbiothrix"Tapinothrix"Thermanaerothrix"ThermosporothrixThermothrixThioflexithrixThiothrixTolypothrixToxothrix

thrix (trichon) — θρίξ

Gender: feminine

Examples: Azomonotrichon

trophos — τροφός

Gender: masculine or feminine

Examples: Rhodoligotrophos

trophos (tropha) — τροφός

Gender: masculine or feminine

Examples: OligotrophaThermosyntropha