Caldanaerobacter
subterraneus

Caldicellulosiruptor
acetigenus - kristjanssonii - lactoaceticus - owensensis - saccharolyticus

Caldilinea
aerophila

Caldimonas
taiwanensis

Caldisphaera
lagunensis

Caldithrix
abyssi

Caldivirga
maquilingensis

Caloramator
coolhaasii - fervidus - proteoclasticus - viterbiensis

Caloranaerobacter
azorensis

Caminibacter
hydrogeniphilus - mediatlanticus - profundus

Caminicella
sporogenes

Campylobacter
coli - concisus - curvus - fetus - gracilis - helveticus - hominis - hyointestinalis - insulaenigrae - jejuni - lari - mucosalis - rectus - showae - sp. - sputorum - upsaliensis

Capnocytophaga
canimorsus - cynodegmi - gingivalis - granulosa - haemolytica - ochracea - sp. - sputigena

Carbophilus
carboxidus

Carboxydocella
sporoproducens - thermautotrophica

Carboxydothermus
ferrireducens - hydrogenoformans - restrictus

Cardiobacterium
hominis - valvarum

Carnimonas
nigrificans

Carnobacterium
alterfunditum - divergens - funditum - gallinarum - inhibens - maltaromaticum - mobile - piscicola - pleistocenium - sp - viridans

Caryophanon
latum - tenue

Castellaniella
defragrans - denitrificans

Catellatospora
bangladeshensis - chokoriensis - citrea - coxensis - koreensis - methionotrophica - tsunoense - yuxiensis

Catellibacterium
nectariphilum

Catellicoccus
marimammalium

Catenibacterium
mitsuokai

Catenococcus
thiocycli

Catenulispora
acidiphila

Catenuloplanes
atrovinosus - castaneus - crispus - indicus - japonicus - nepalensis - niger

Catenulospora
rubra

Caulobacter
crescentus - fusiformis - halobacteroides - henricii - leidyi - segnis - sp. - vibrioides

CDC
group

Cedecea
davisae - genomospecies - lapagei - neteri

Cellulomonas
biazotea - bibula - bogoriensis - cellasea - denverensis - fermentans - fimi - flavigena - gelida - hominis - humilata - iranensis - persica - sp. - terrae - turbata - uda - xylanilytica

Cellulophaga
algicola - baltica - fucicola - lytica - pacifica

Cellulosimicrobium
cellulans - funkei

Cellvibrio
fibrivorans - fulvus - gandavensis - mixtus - ostraviensis - sp. - vulgaris

Centipeda
periodontii

Cerasibacillus
quisquiliarum

Cetobacterium
ceti

Chainia
azura - grisea

Chelatococcus
asaccharovorans

Chimaereicella
alkaliphila

Chitinibacter
tainanensis

Chitinimonas
koreensis - taiwanensis

Chitinophaga
arvensicola - filiformis - japonensis - pinensis - sancti

Chlorobaculum
tepidum

Chlorobium
ferrooxidans - limicola - luteolum - phaeobacteroides - phaeovibrioides

Chloroflexus
aggregans - aurantiacus

Chondromyces
apiculatus - crocatus - lanuginosus - pediculatus - robustus

Chromatium
sp.

Chromobacterium
sp. - violaceum

Chromobactertium
sp.

Chromohalobacter
beijerinckii - canadensis - israelensis - marismortui - salexigens - sarecensis

Chryseobacterium
balustinum - daecheongense - defluvii - gleum - indologenes - indoltheticum - joostei - scophthalmum - shigense - sp. - vrystaatense

Chryseomonas
luteola

Chrysiogenes
arsenatis

Citreicella
thiooxidans

Citricoccus
alkalitolerans - muralis

Citrobacter
amalonaticus - braakii - diversus - farmeri - freundii - genomospecies - gillenii - koseri - murliniae - ostermanii - rodentium - sedlakii - sp. - werkmanii - youngae

Clavibacter
michiganense - michiganensis - sp.

Clavisporangium
rectum

Clostridium
absonum - aceticum - acetireducens - acetobutylicum - acidisoli - aciditolerans - acidiurici - acidurici - aerotolerans - akagii - aldrichii - algidicarnis - algidixylanolyticum - algoriphilum - alkalicellulosi - aminophilum - aminovalericum - amygdalinum - asparagiforme - aurantibutyricum - autoethanogenum - barati - baratii - bartlettii - beijerinckii - bifermentans - bifermentens - bolteae - botulinum - bowmanii - butyricum - cadaveris - caminithermale - carboxidivorans - carnis - celatum - celerecrescens - cellobioparum - cellulolyticum - cellulovorans - chartatabidum - chauvoei - clostridiiforme - clostridioforme - coccoides - cochlearium - cocleatum - colicanis - colinum - collagenovorans - cylindrosporum - difficile - diolis - disporicum - drakei - estertheticum - fallax - felsineum - fimetarium - formicaceticum - frigidicarnis - frigoris - ganghwense - gasigenes - ghoni - ghonii - glycolicum - glycyrrhizinilyticum - grantii - haemolyticum - halophilum - hathewayi - herbivorans - hiranonis - histolyticum - homopropionicum - hungatei - hylemonae - indolis - innocuum - intestinale - irregulare - irregularis - isatidis - jejuense - kluyveri - lactatifermentans - lacusfryxellense - lentocellum - leptum - limosum - litorale - lituseburense - ljungdahlii - lundense - magnum - malenominatum - mangenotii - mayombei - methoxybenzovorans - methylpentosum - neopropionicum - nexile - novyi - oceanicum - orbiscindens - oroticum - papyrosolvens - paradoxum - paraputrificum - pascui - pasteurianum - peptidivorans - perfringens - phytofermentans - plagarum - polysaccharolyticum - populeti - propionicum - proteoclasticum - proteolyticum - psychrophilum - puniceum - purinilyticum - putrefaciens - putrificum - quinii - ramosum - rectum - roseum - saccharobutylicum - saccharogumia - saccharolyticum - saccharoperbutylacetonicum - sardiniense - sartagoforme - scatologenes - schirmacherense - scindens - septicum - sordellii - sp. - sphenoides - spiroforme - sporogenes - sporosphaeroides - stercorarium - sticklandii - straminisolvens - subterminale - symbiosum - termitidis - tertium - tetani - tetanomorphum - thermoalcaliphilum - thermobutyricum - thermocellum - thermopalmarium - thermosuccinogenes - thiosulfatireducens - tunisiense - tyrobutyricum - uliginosum - ultunense - uzonii - vincentii - viride - xylanolyticum - xylanovorans

Cobetia
marina

Coenonia
anatina

Cohnella
hongkongensis - thermotolerans

Collimonas
fungivorans

Collinsella
aerofaciens - intestinalis - stercoris

Colwellia
aestuarii - hornerae - maris - psychrerythraea

Comamonas
acidovorans - aquatica - badia - denitrificans - kerstersii - koreensis - nitrativorans - sp. - terrigena - testosteroni

Conchiformibius
kuhniae - steedae

Conexibacter
woesei

Coprothermobacter
platensis - proteolyticus

Corallococcus
coralloides - exiguus

Coriobacterium
glomerans

Corynebacterium
accolens - acetoacidophilum - afermentans - ammoniagenes - amycolatum - appendicis - aquilae - argentoratense - atypicum - aurimucosum - auris - auriscanis - beticola - bovis - callunae - camporealensis - capitovis - casei - caspium - ciconiae - confusum - coyleae - cystitidis - diphtheriae - durum - efficiens - falsenii - fastidiosum - felinum - flavescens - flavigenum - freneyi - genitalium - glaucum - glucuronolyticum - glutamicum - halotolerans - herculis - hoagii - imitans - jeikeium - kroppenstedtii - kutscheri - lepus - lipophiloflavum - macginleyi - mastitidis - matruchotii - melassecola - minutissimum - mucifaciens - mycetoides - nephtidii - nitrilophilus - phocae - pilosum - propinquum - pseudodiphtheriticum - pseudotuberculosis - renale - riegelii - segmentosum - seminale - simulans - singulare - sp. - sphenisci - spheniscorum - striatum - sundsvallense - terpenotabidum - testudinoris - thomssenii - tuberculostearicum - ulcerans - urealyticum - ureicelerivorans - variabile - vitaeruminis - xerosis

Coryneform
sp

Couchioplanes
caeruleus

Craurococcus
roseus

Crossiella
cryophila - equi

Cryobacterium
psychrophilum

Cryptanaerobacter
phenolicus

Cryptobacterium
curtum

Cryptosporangium
arvum - aurantiacum - japonicum - minutisporangium

Cryptosporangum
japonicum

Cupriavidus
basilensis - campinensis - gilardii - metallidurans - necator - oxalaticus - pauculus - respiraculi - sp. - taiwanensis

Curtobacterium
albidum - citreum - flaccumfaciens - herbarum - luteum - plantarum - pusillum - sp.

Curvibacter
delicatus - lanceolatus

Cyclobacterium
amurskyense - marinum

Cycloclasticus
pugetti

Cystobacter
armeniaca - badius - disciformis - ferrugineus - fuscus - gracilis - miniatus - minus - sp. - velatus - violaceus

Cytophaga
allerginae - arvensicola - aurantiaca - fermentans - hutchinsonii - latercula - marinoflava - sp. - winogradsky - xylanolytica