Species epithets whose last component is a present participle (usually ending in -ens or -ans) can be in any gender. They are treated like Group B adjectives and belong to the third declension. The actual gender is determined by the gender of the genus name [Rule 12c (1)]. One part of the list of epithets formed in that manner is provided below. Genus names and subspecies names derived from present participles are not listed here. A special case is genes, which originally is an Ancient Greek suffix meaning "born from" but is nowadays mainly used as a Neolatin suffix meaning "producing". See also the LPSN introductory page on forming names.
In the case of a ☞ new combination these epithets must not be adapted to the gender of the genus name. This is a special case of Group B adjectives.
Bacillus coagulans — Bacteroides coagulans — Bombiscardovia coagulans — Ezakiella coagulans — Hyphomicrobium coagulans — Staphylococcus coagulans — Weizmannia coagulans
Achromobacter mucicolens — Actinomyces denticolens — Alloscardovia omnicolens — Bifidobacterium denticolens — Corynebacterium accolens — Paenibacillus planticolens — Pandoraea horticolens — Parascardovia denticolens — Pedobacter planticolens — Pyramidobacter piscolens — Treponema isoptericolens
Actinobacillus actinomycetemcomitans — "Actinomyces actinomycetemcomitans" — Aggregatibacter actinomycetemcomitans — "Bacterium actinomycetemcomitans" — Haemophilus actinomycetemcomitans — Roseivirga echinicomitans — Vibrio comitans
Alicyclobacillus contaminans — Anoxybacillus contaminans — Burkholderia contaminans — Chryseobacterium contaminans — Herminiimonas contaminans — Lysinibacillus contaminans — Ornithinibacillus contaminans — Paenibacillus contaminans — Paracoccus contaminans — Pseudochelatococcus contaminans — Rahnella contaminans — Sphingopyxis contaminans — "Sphingorhabdus contaminans" — Sphingorhabdus contaminans — Sporosarcina contaminans
Aquimarina celericrescens — Arthrobacter celericrescens — Bacillus crescens — Clostridium celerecrescens — Cohaesibacter celericrescens — Flavobacterium celericrescens — Kluyvera cryocrescens — Lacrimispora celerecrescens — Liberibacter crescens — Marinobacter segnicrescens — Methylophaga nitratireducenticrescens — Oryzihumus leptocrescens — Robertmurraya crescens — Spiroplasma velocicrescens — Thermococcus celericrescens — Thiobacillus rapidicrescens
Acidiplasma cupricumulans — Acinetobacter cumulans — Catenisphaera adipataccumulans — Ferroplasma cupricumulans — Variovorax boronicumulans
Cochlodiniinecator piscidefendens — Frateuria defendens — "Candidatus Williamhamiltonella defendens" corrig.
"Microbulbifer degradans" — Olivibacter oleidegradans — Rhodococcus degradans — Saccharophagus degradans
"Bacillus devorans" — Flavobacterium devorans — Paenibacillus agaridevorans — Steroidobacter agaridevorans — Thalassobacillus devorans
Acidithiobacillus ferridurans — Acidocella aluminiidurans — Adhaeribacter radiodurans — Alcalilimnicola halodurans — Alkalihalobacillus halodurans — Alkalilimnicola halodurans corrig. — Alsobacter metallidurans — Amycolatopsis acididurans — Aridibacter famidurans — Arthrobacter halodurans — Bacillus halodurans — Bacillus psychrodurans — Bacillus salidurans — Bacillus sporothermodurans — "Bacillus xerothermodurans" — Companilactobacillus halodurans — Cupriavidus metallidurans — Deinococcus radiodurans — Desulfosporosinus acididurans — Desulfosporosinus metallidurans — Dyella halodurans — Dyella psychrodurans — Enterococcus durans — Falsiroseomonas selenitidurans — Ferdinandcohnia salidurans — Flavobacterium acidurans — Fredinandcohnia salidurans corrig. — "Candidatus Gallionella acididurans" — Halalkalibacterium halodurans — Halomonas halodurans — Halomonas zincidurans — Halorubrum halodurans — Heyndrickxia sporothermodurans — "Hymenobacter radiodurans" — Lactobacillus halodurans — Lentibacillus halodurans — Maribacter cobaltidurans — Marinobacter halodurans — Marivibrio halodurans — Mesorhizobium metallidurans — Methanobrevibacter acididurans — Methylobacterium durans — "Methylobacterium radiodurans" — Microbacterium radiodurans — "Micrococcus radiodurans" — Micromonospora nickelidurans — Nocardia acididurans — Nocardioides euryhalodurans — Paenibacillus xerothermodurans — Pararoseomonas radiodurans — Pediococcus ethanolidurans — "Pseudomonas halodurans" — Psychrobacillus psychrodurans — Psychrobacter halodurans — Ralstonia metallidurans — Rhizobium metallidurans — Roseivivax halodurans — Roseomonas radiodurans — Roseomonas selenitidurans — Salinicoccus halodurans — Sphingomonas radiodurans — Streptococcus durans — Streptomyces acididurans — Thalassococcus halodurans — Wautersia metallidurans
Burkholderia peredens — Caballeronia peredens — Defluviitalea raffinosedens — Halorubrum glutamatedens — Pseudomonas nicosulfuronedens — Williamsia serinedens
Altererythrobacter salegens — Arenibacter catalasegens — Arthrobacter terregens — "Ascidiaceibacter salegens" — Aureobacterium terregens — Beneckea natriegens — Croceibacterium salegens — Flavobacterium salegens — Hallella seregens — Halopseudomonas salegens — "Leptotrichia sanguinegens" — Microbacterium terregens — "Neopseudomonas salegens" — Pseudidiomarina gelatinasegens — "Pseudomonas natriegens" — Pseudomonas protegens — Pseudomonas salegens — Salegentibacter salegens — Sneathia sanguinegens — Vibrio natriegens
Advenella alkanexedens — "Arenimonas alkanexedens" — Dehalogenimonas formicexedens — Desulfoglaeba alkanexedens — Nannocystis exedens — Paenibacillus agarexedens — Paenibacillus xylanexedens
Aestuariibacter salexigens — Bacillus salexigens — Bryantella formatexigens — Chromatium salexigens — Chromohalobacter salexigens — Desulfocapsa sulfexigens corrig. — Desulfovibrio salexigens — Desulfuromonas acetexigens — Gramella salexigens — Haliea salexigens — Halochromatium salexigens — Maridesulfovibrio salexigens — Marinobacter salexigens — Marinobacter salinexigens — Marvinbryantia formatexigens — Melitea salexigens — Mycoavidus cysteinexigens — Pararhodospirillum sulfurexigens — "Rheinheimera salexigens" — Rheinheimera salexigens — Rhodopseudomonas pentothenatexigens — Rhodospirillum salexigens — Rhodospirillum sulfurexigens — Rhodothalassium salexigens — Salibacillus salexigens — Salimicrobium salexigens — Thalassobaculum salexigens — "Trichloromonas acetexigens" — Virgibacillus salexigens
"Flavobacterium extorquens" — Methylobacterium extorquens — Methylorubrum extorquens — Protomonas extorquens
Acetobacter liquefaciens — Acetobacter liquefaciens — Achromobacter aegrifaciens — Acidisphaera rubrifaciens — Adlercreutzia equolifaciens — "Aerobacter liquefaciens" — Agrobacterium tumefaciens — Alteromonas nigrifaciens — Alteromonas putrefaciens — Aquibacter zeaxanthinifaciens — Arthrobacter ureafaciens — Aureobacterium liquefaciens — Bacillus acidinfaciens — Bacillus amyloliquefaciens — Bacillus pulvifaciens — "Bacillus putrefaciens" — "Bacterium flaccumfaciens" — "Bacterium tumefaciens" — Bacteroides acidifaciens — "Bacteroides aerofaciens" — Bacteroides propionicifaciens — Brenneria rubrifaciens — Brevibacterium liquefaciens — Clostridium putrefaciens — Collinsella aerofaciens — Corynebacterium flaccumfaciens — Corynebacterium liquefaciens — Corynebacterium mucifaciens — "Corynebacterium ureafaciens" — Cosenzaea myxofaciens — Curtobacterium flaccumfaciens — Dialister propionicifaciens — Dyella amyloliquefaciens — "Eberthella alcalifaciens" — Ellagibacter isourolithinifaciens — "Candidatus Endobryopsis kahalalidifaciens" corrig. — "Enterobacter liquefaciens" — Erwinia rubrifaciens — Eubacterium aerofaciens — "Ferrovum myxofaciens" — Globicatella sulfidifaciens — Gluconacetobacter liquefaciens corrig. — Gluconoacetobacter liquefaciens — "Gluconobacter liquefaciens" corrig. — Gordonibacter urolithinfaciens — Kitasatospora aureofaciens — "Kitasatospora viridifaciens" — Lactobacillus kefiranofaciens — Lentibacillus amyloliquefaciens — Mesoflavibacter zeaxanthinifaciens — Microbacterium liquefaciens — Micromonospora viridifaciens — Moraxella nonliquefaciens — Mycoplasma lipofaciens — Mycoplasma putrefaciens — Mycoplasmopsis lipofaciens — Natronorubrum sulfidifaciens — Nubsella zeaxanthinifaciens — Paenarthrobacter ureafaciens — Paenibacillus pulvifaciens — Parabacteroides acidifaciens — Paracoccus carotinifaciens — Paracoccus zeaxanthinifaciens — "Pedobacter zeaxanthinifaciens" — Propionibacterium acidifaciens — Proteus myxofaciens — Providencia alcalifaciens — Pseudoalteromonas nigrifaciens — Pseudomonas aureofaciens — Rhizomonas suberifaciens — Rhizorhapis suberifaciens — Robiginitalea myxolifaciens — Rubritalea squalenifaciens — Ruminococcus flavefaciens — Salinicoccus halitifaciens — Serratia liquefaciens — Shewanella putrefaciens — Siansivirga zeaxanthinifaciens — Siminovitchia acidinfaciens — Slackia equolifaciens — Sphingobium suberifaciens — Sphingomicrobium astaxanthinifaciens — Sphingomonas astaxanthinifaciens — Sphingomonas carotinifaciens — Sphingomonas floccifaciens — Sphingomonas spermidinifaciens — Sphingomonas suberifaciens — Streptomyces albofaciens — Streptomyces ambofaciens — Streptomyces aureofaciens — Streptomyces graminofaciens — Streptomyces melanosporofaciens — Streptomyces nigrifaciens — Streptomyces phaeofaciens — Streptomyces roseifaciens — Streptomyces sulfonofaciens — Sulfobacillus benefaciens — Thermus amyloliquefaciens — Treponema succinifaciens
"Abyssisolibacter fermentans" — Acetobacter oryzifermentans — Acidaminococcus fermentans — Actinotalea fermentans — Alkalibacter saccharofermentans — Alkaliphilus peptidifermentans corrig. — Anaerotignum lactatifermentans — Anoxybacter fermentans — "Bacillus bifermentans" — Bacillus glycinifermentans — Brachybacterium tyrofermentans — "Candidatus Brevefilum fermentans" — Brevibacterium fermentans — "Candidatus Brevifilum fermentans" corrig. — "Candidatus Caldatribacterium saccharofermentans" — Caproicibacter fermentans — Caproicibacterium lactatifermentans — Cellulomonas fermentans — Clostridium bifermentans — "Clostridium cellulofermentans" — Clostridium lactatifermentans — Clostridium phytofermentans — Corynebacterium afermentans — Cytophaga fermentans — Desulfurococcus fermentans — Dyadobacter fermentans — Gallibacterium trehalosifermentans — Geothrix fermentans — Gluconacetobacter sucrofermentans — Halanaerobium fermentans corrig. — Haloanaerobium fermentans — "Komagatabacter sucrofermentans" — Komagataeibacter sucrofermentans — "Lachnoclostridium phytofermentans" — Lactiplantibacillus fabifermentans — Lactobacillus bifermentans — Lactobacillus fabifermentans — Lactobacillus malefermentans — Lactobacillus oligofermentans — Loigolactobacillus bifermentans — Macellibacteroides fermentans — Mycoplasma fermentans — Mycoplasmopsis fermentans — Paludibaculum fermentans — Paraclostridium bifermentans — Paucilactobacillus oligofermentans — "Pelorhabdus rhamnosifermentans" — Pelosinus fermentans — Proteiniphilum saccharofermentans — "Candidatus Pseudoramibacter fermentans" — "Psychrosinus fermentans" — Rhodoferax fermentans — Rodentibacter trehalosifermentans — Roseiarcus fermentans — Ruminiclostridium herbifermentans — Saccharicrinis fermentans — Secundilactobacillus malefermentans — Staphylococcus piscifermentans — Streptococcus oligofermentans — Streptomyces fructofermentans — Tepidibacillus fermentans — Vagococcus acidifermentans — Variimorphobacter saccharofermentans
Methanocaldococcus fervens — Methanococcus fervens — Streptomyces fervens — "Streptomyces fervens" — Streptoverticillium fervens
Acetobacter nitrogenifigens — Ahniella affigens — Ciceribacter azotifigens — Flavobacterium nitrogenifigens — Geomonas azotofigens — "Geomonas nitrogeniifigens" — Ideonella azotifigens — Natronobacillus azotifigens — Novosphingobium nitrogenifigens — Oleiliquidispirillum nitrogeniifigens — Paenibacillus azotifigens — Paraburkholderia azotifigens — Pseudomonas azotifigens — Sphingomonas azotifigens — Stutzerimonas azotifigens
Arthrobacter flavescens — Aureobacterium flavescens — Conservatibacter flavescens — Corynebacterium flavescens — Enterococcus flavescens — "Flavobacterium flavescens" — Leptobacterium flavescens — Luteolibacter flavescens — Marinomonas flavescens — Methanosarcina flavescens — Microbacterium flavescens — Microvirga flavescens — Muricauda flavescens — Mycobacterium flavescens — Mycolicibacterium flavescens — Myxococcus flavescens — Neisseria flavescens — Nocardioides flavescens — Nocardiopsis flavescens — Pseudomonas flavescens — "Rhizobium flavescens" — Streptomyces albiflavescens — Tessaracoccus flavescens — Virgibacillus flavescens
Balneimonas flocculans corrig. — Balneomonas flocculans — "Comamonas flocculans" — Hymenobacter flocculans — Microvirga flocculans — "Candidatus Moduliflexus flocculans" — Rubritepida flocculans — "Siccationidurans flocculans" — Sinimarinibacterium flocculans
Actinomadura luteofluorescens — "Actinomyces citreofluorescens" — "Actinomyces fluorescens" — Pseudomonas fluorescens — Streptomyces citreofluorescens — Streptomyces fluorescens — "Streptomyces luteofluorescens"
Acetomicrobium hydrogeniformans — Acidaminobacter hydrogenoformans — Actinomadura sporangiiformans — "Aestuariispira ectoiniformans" — Allisonella histaminiformans — Anaerobaculum hydrogeniformans — Bacillus azotoformans — Bacillus ectoiniformans — "Bacillus gonidiaformans" — Bacteroides zoogleoformans — "Caecibacterium sporoformans" — Caecibacterium sporoformans — Calidifontibacillus azotoformans — Capsularis zoogleoformans corrig. — Carboxydothermus hydrogenoformans — Cereibacter azotoformans — Clostridium hydrogeniformans — "Corynebacterium laevaniformans" — "Candidatus Defluviicoccus tetradiiformans" corrig. — "Candidatus Dehalogenimonas etheniformans" — Dulcicalothrix necridiiformans — Faecalicoccus acidiformans — Fortiea necridiiformans — Fusobacterium gonidiaformans — "Halanaerobium hydrogenoformans" — Luteovulum azotoformans — "Luteovulum azotoformans" — "Candidatus Manganitrophus noduliformans" — Meiothermus cateniformans — Microbacterium laevaniformans — "Microbispora cellulosiformans" — Nocardiopsis synnemataformans — "Peteryoungia rosettiformans" — Prevotella zoogleoformans — Proteinivorax hydrogeniformans — Pseudomonas azotoformans — Rhizobium rosettiformans — Rhodobacter azotoformans — Ruthenibacterium lactatiformans — Schinkia azotoformans — Streptomyces sporangiiformans — Streptomyces synnematoformans — Suicoccus acidiformans — Thermoanaerobacterium butyriciformans — Thermosipho globiformans
Alkalispirochaeta sphaeroplastigenens — Mechercharimyces asporophorigenens — Sphingomonas sanxanigenens — Spirochaeta sphaeroplastigenens — Virgisporangium aliadipatigenens
Acetobacteroides hydrogenigenes — Actinobacillus succinogenes — Actinomadura nitritigenes — "Actinomyces ansochromogenes" — "Actinomyces diastatochromogenes" — Actinomyces pyogenes — Actinomyces pyogenes — "Actinomyces violaceochromogenes" — "Actinomyces viridochromogenes" — Actinoplanes ianthinogenes — "Acuformis alcaligenes" — Aedoeadaptatus acetigenes — Aeromonas enteropelogenes — Agrobacterium rhizogenes — Alkalibaculum sporogenes — "Anaerophilus nitritogenes" — Aquitalea pelogenes — "Candidatus Arcanobacter pyogenes" — Arcanobacterium pyogenes — Arthrobacter polychromogenes — Azomonas macrocytogenes — Azomonotrichon macrocytogenes — Azotobacter macrocytogenes — "Bacillus necrogenes" — "Bacillus pyogenes" — "Bacillus scatologenes" — "Bacillus sporogenes" — "Bacterium ammoniagenes" — "Bacterium monocytogenes" — Bacteroides helcogenes — Bacteroides pyogenes — Bacteroides succinogenes — "Beneckea gazogenes" — Beneckea gazogenes — Biomaibacter acetigenes — Brevibacterium ammoniagenes — Caminicella sporogenes — Chryseobacterium indologenes — Clostridium gasigenes — Clostridium nitritogenes — Clostridium scatologenes — Clostridium sporogenes — Clostridium sulfidigenes — Clostridium thermosuccinogenes — Clostridium thermosulfurigenes corrig. — "Collinsella acetigenes" — "Colobactrum aerogenes" — Corynebacterium ammoniagenes — Corynebacterium pyogenes — Curtobacterium ammoniigenes — Desulfocapsa thiozymogenes — Desulfonispora thiosulfatigenes — Dorea acetigenes — Enterobacter aerogenes — Ercella succinigenes — Eubacterium coprostanoligenes — Eubacterium nitritogenes — Faecalicatena acetigenes — Fibrobacter succinogenes — Flavobacterium ammoniigenes — Flavobacterium indologenes — Fusobacterium necrogenes — Geobacter thiogenes — Hallerella succinigenes — Halopelagius fulvigenes — Haloplanus aerogenes — "Helcococcus pyogenes" — Kingella indologenes — Klebsiella aerogenes — Lechevalieria aerocolonigenes — Lentzea aerocolonigenes — "Leptothrix trichogenes" — Listeria monocytogenes — Lysobacter enzymogenes — Mediterraneibacter butyricigenes — Methylobacillus glycogenes — Microbispora amethystogenes — Microbispora chromogenes — Micromonospora purpureochromogenes — Moryella indoligenes — Myceligenerans crystallogenes — Mycobacterium farcinogenes — Mycolicibacterium farcinogenes — "Necromonas achromogenes" — "Nitrosopumilus cobalaminigenes" — "Nocardia aerocolonigenes" — Nocardiopsis chromatogenes — Olsenella scatoligenes — Oscillibacter valericigenes — Oxalobacter formigenes — Paludibacter propionicigenes — Pasteurella aerogenes — Pelobacter seleniigenes — "Phytomonas rhizogenes" — Proteiniborus ethanoligenes — Proteiniphilum acetatigenes — Pseudarthrobacter polychromogenes — "Pseudoclostridium thermosuccinogenes" — Pseudomonas alcaligenes — Pseudomonas pseudoalcaligenes — Psychrobacter fulvigenes — Pyrinomonas methylaliphatogenes — Rhizobium rhizogenes — Rhizobium tumorigenes — Saccharofermentans acetigenes — Saccharothrix aerocolonigenes — Seleniibacterium seleniigenes — Sporanaerobacter acetigenes — Staphylococcus chromogenes — Streptacidiphilus melanogenes — Streptococcus pyogenes — Streptomyces achromogenes — "Streptomyces aerocolonigenes" — Streptomyces albidochromogenes — "Streptomyces ansochromogenes" — Streptomyces cinerochromogenes — Streptomyces cyaneochromogenes — Streptomyces diastatochromogenes — Streptomyces fuscichromogenes — Streptomyces fuscigenes — Streptomyces griseochromogenes — Streptomyces indoligenes — Streptomyces melanogenes — Streptomyces olivochromogenes — Streptomyces parvisporogenes — Streptomyces phaeochromogenes — Streptomyces phaeogriseichromatogenes — Streptomyces phaeoluteichromatogenes — Streptomyces polychromogenes — Streptomyces racemochromogenes — Streptomyces sparsogenes — Streptomyces violaceochromogenes — Streptomyces viridochromogenes — Streptomyces xanthochromogenes — Streptosporangium amethystogenes — Streptosporangium violaceochromogenes — Streptoverticillium parvisporogenes corrig. — Suttonella indologenes — Tepidibacter formicigenes — Thermoanaerobacterium thermosulfurigenes — Thermosulfuriphilus ammonigenes — Toxothrix trichogenes — Tractidigestivibacter scatoligenes — Trichlorobacter thiogenes — Trueperella pyogenes — Vibrio aerogenes — Vibrio aphrogenes — Vibrio gazogenes — Vibrio succinogenes — Wolinella succinogenes
"Acetanaerobacter ethanolgignens" — Acetivibrio ethanolgignens — Blautia acetigignens — Caldanaerovirga acetigignens — Dehalogenimonas alkenigignens — Thermoanaerobacter sulfurigignens
Bifidobacterium choladohabitans — Flavimonas oryzihabitans — "Flavobacterium oryzihabitans" — Glycomyces phytohabitans — Kibdelosporangium phytohabitans — Lactobacillus suantsaiihabitans — Levilactobacillus suantsaiihabitans — Levilactobacillus suantsaiihabitans — Methylobacterium oryzihabitans — Nocardia rhizosphaerihabitans — Paenibacillus phytohabitans — Pseudomonas oryzihabitans — "Rhizobium oryzihabitans" — Sediminibacterium magnilacihabitans — Streptomyces phytohabitans — Streptomyces rhizosphaerihabitans — Vibrionimonas magnilacihabitans
Carnobacterium inhibens — Citreicoccus inhibens — Phaeobacter inhibens — Roseovarius nubinhibens — Serratia inhibens — Streptomyces inhibens — Vibrio inhibens
"Bacterium albilineans" — "Phytomonas rubrilineans" — Pseudomonas rubrilineans — Xanthomonas albilineans
Brevibacterium lutescens — "Flavobacterium lutescens" — Halomonas lutescens — "Lyngbya lutescens" — Lyngbya lutescens — Phormidium lutescens — "Schizosiphon lutescens" — "Streptomyces luteolutescens" — Streptostemon lutescens
"Aerobacillus macerans" — Bacillus macerans — Paenibacillus macerans — "Candidatus Pectobacterium macerans" corrig.
Desulfallas sapomandens — Desulfotomaculum sapomandens — Petrobacter succinatimandens — Tepidiphilus succinatimandens
Alcanivorax xenomutans — Anaerovorax odorimutans — Anseongella ginsenosidimutans — "Arachidicoccus ginsenosidimutans" — Caedibacter pseudomutans — Caldimicrobium thiodismutans — Chryseobacterium ginsenosidimutans — Companilactobacillus ginsenosidimutans — Desulfolutivibrio sulfodismutans — Desulfonatronospira thiodismutans — Desulfonatronovibrio thiodismutans — Desulfonatronum thiodismutans — Desulfovibrio sulfodismutans — Flavisolibacter ginsenosidimutans — Flavobacterium ginsenosidimutans — "Hankyongella ginsenosidimutans" — "Lactobacillus ginsenosidimutans" — "Novosphingobium ginsenosidimutans" — Olivibacter ginsenosidimutans — Pedobacter ginsenosidimutans — Pedococcus ginsenosidimutans — Phnomibacter ginsenosidimutans — Phycicoccus ginsenosidimutans — Pseudobacter ginsenosidimutans — Pseudoflavitalea ginsenosidimutans — Pseudomonas chloritidismutans — Ramlibacter ginsenosidimutans — Rhodanobacter ginsenosidimutans — Solirubrobacter ginsenosidimutans — Sphingobacterium ginsenosidimutans — Sphingomonas ginsenosidimutans — Sphingosinicella ginsenosidimutans — Streptococcus mutans — Stutzerimonas chloritidismutans — Syntrophococcus sucromutans — Terrabacter ginsenosidimutans — Thermosulfurimonas dismutans