Paenibacillus
agarexedens - agaridevorans - alginolyticus - alkaliterrae - alvei - amylolyticus - anaericanus - apiarius - assamensis - azoreducens - azotofixans - barcinonensis - borealis - brasilensis - chibensis - chinjuensis - chitinolyticus - chondroitinus - cineris - cookii - curdlanolyticus - daejeonensis - dendritiformis - ehimensis - favisporus - gansuensis - glucanolyticus - glycanilyticus - graminis - illinoisensis - jamilae - kobensis - lactis - larvae - lautus - macerans - macquariensis - massiliensis - motobuensis - naphthalenovorans - nematophilus - odorifer - pabuli - peoriae - phyllosphaerae - polymyxa - rhizosphaerae - sabinae - sp. - stellifer - terrae - thiaminolyticus - timonensis - turicensis - validus - wynnii - xinjiangensis - xylanilyticus

Palaeococcus
ferrophilus - helgesonii

Paludibacter
propionicigenes

Pandoraea
apista - norimbergensis - pnomenusa - pulmonicola

Pannonibacter
phragmitetus

Pantoea
agglomerans - ananatis - citrea - dispersa - punctata - stewartii - terrea

Papillibacter
cinnamivorans

Parabacteroides
distasonis - johnsonii

Paracoccus
alcaliphilus - alkenifer - aminophilus - aminovorans - denitrificans - kocurii - pantotrophus - seriniphilus - solventivorans - sp. - versutus

Paralactobacillus
selangorensis

Paraliobacillus
ryukyuensis

Parascardovia
denticolens

Parasporobacterium
paucivorans

Parvibaculum
lavamentivorans

Parvimonas
micra

Parvopolyspora
pallida

Pasteurella
aerogenes - multocida

Patulibacter
minatonensis

Paucibacter
toxinivorans

Paucimonas
lemoignei

Paucisalibacillus
globulus

Pectinatus
cerevisiiphilus - frisingensis - haikarae - sp.

Pectobacterium
atrosepticum - betavasculorum - carotovorum - cypripedii - wasabiae

Pediococcus
acidilactici - cellicola - claussenii - damnosus - dextrinicus - inopinatus - parvulus - pentosaceus - stilesii

Pedobacter
africanus - caeni - cryoconitis - heparinus - piscium - saltans

Pelobacter
acetylenicus - acidigallici - carbinolicus - massiliensis - propionicus - sp. - venetianus

Pelodictyon
phaeum

Pelomonas
saccharophila

Pelosinus
fermentans

Pelospora
glutarica

Pelotomaculum
terephthalicicum - thermopropionicum

Peptococcus
niger

Peptoniphilus
asaccharolyticus - harei - indolicus - ivorii - lacrimalis

Peptostreptococcus
anaerobius - sp. - stomatis

Peredibacter
starrii

Persephonella
guaymasensis - hydrogeniphila - marina

Persicivirga
xylanidelens

Persicobacter
diffluens

Petrimonas
sulfuriphila

Petrobacter
succinatimandens

Petrotoga
halophila - mexicana - miotherma - mobilis - olearia - sibirica

Phaeobacter
gallaeciensis - inhibens

Phaeospirillum
fulvum - molischianum

Phascolarctobacterium
faecium

Phenylobacterium
falsum - immobile - lituiforme

Phocoenobacter
uteri

Photobacterium
damselae - halotolerans - iliopiscarium - indicum - lipolyticum - phosphoreum

Photorhabdus
asymbiotica - luminescens - temperata

Phyllobacterium
myrsinacearum - rubiacearum - trifolii

Picrophilus
oshimae - torridus

Pigmentiphaga
kullae

Pilimelia
anulata - terevasa

Pirellula
staleyi

Planctomyces
brasiliensis - limnophilus - maris

Planifilum
fimeticola - fulgidum

Planobispora
longispora - rosea

Planococcus
antarcticus - citreus - kocurii - maitriensis - maritimus - rifietoensis - stackebrandtii

Planomicrobium
chinense - koreense - mcmeekinii - psychrophilum

Planomonospora
alba - parontospora - sphaerica - venezuelensis

Planotetraspora
mira - silvatica

Plantibacter
flavus

Pleomorphomonas
oryzae

Plesiocystis
pacifica

Plesiomonas
shigelloides

Polaribacter
dokdonensis - filamentus

Polaromonas
naphthalenivorans

Polyangium
cellulosum - fumosum - sorediatum - sp. - spumosum

Polymorphospora
rubra

Pontibacillus
chungwhensis - marinus

Porphyrobacter
cryptus - dokdonensis - donghaensis - neustonensis - sanguineus - sp. - tepidarius

Porphyromonas
asaccharolytica - gingivalis - gulae - macacae

Pragia
fontium

Prauserella
alba - halophila - rugosa

Prevotella
albensis - baroniae - bergensis - bivia - bryantii - buccae - buccalis - dentalis - denticola - disiens - intermedia - marshii - melaninogenica - multiformis - multisaccharivorax - nigrescens - oralis - oris - pallens - salivae - shahii

Proactinomyces
roseus

Promicromonospora
aerolata - citrea - sp. - sukumoe - vindobonensis

Promyxobacterium
flavum

Propionibacterium
acidipropionici - acnes - australiense - avidum - cyclohexanicum - freudenreichii - granulosum - jensenii - microaerophilum - propionicum - thoenii

Propionicimonas
paludicola

Propioniferax
innocua

Propionigenium
maris - modestum

Propionimicrobium
lymphophilum

Propionispira
arboris

Propionispora
hippei - vibrioides

Propionivibrio
dicarboxylicus - limicola - pelophilus

Prosthecobacter
debontii - dejongeii - vanneervenii

Prosthecochloris
aestuarii - vibrioformis

Prosthecomicrobium
polyspheroidum

Proteiniphilum
acetatigenes

Proteus
hauseri - mirabilis - myxofaciens - penneri - vulgaris

Providencia
alcalifaciens - heimbachae - rettgeri - rustigianii - stuartii - vermicola

Pseudaminobacter
salicylatoxidans

Pseudoalteromonas
agarivorans - aliena - atlantica - aurantia - carrageenovora - citrea - denitrificans - espejiana - flavipulchra - haloplanktis - luteoviolacea - mariniglutinosa - nigrifaciens - paragorgicola - peptidolytica - prydzensis - rubra - tetraodonis - translucida - tunicata - undina

Pseudobutyrivibrio
ruminis - xylanivorans

Pseudoclavibacter
helvolus - sp.

Pseudomonas
abietaniphila - aeruginosa - agarici - alcaligenes - alcaliphila - amygdali - anguilliseptica - antarctica - argentinensis - asplenii - atlantica - avellanae - azotifigens - azotoformans - balearica - borbori - brassicacearum - brenneri - cannabina - carboxydohydrogena - cedrina - chlororaphis - cichorii - citronellolis - congelans - corrugata - costantinii - cremoricolorata - extremorientalis - ficuserectae - flavescens - fluorescens - fragi - frederiksbergensis - fulva - fuscovaginae - gessardii - graminis - grimontii - halophila - indica - jessenii - jinjuensis - kilonensis - koreensis - libanensis - lini - lundensis - lutea - luteola - mandelii - marginalis - mediterranea - meliae - mendocina - mephitica - migulae - monteilii - moraviensis - mosselii - multiresinivorans - nitroreducens - oleovorans - orientalis - oryzihabitans - otitidis - pachastrellae - palleroniana - panacis - parafulva - peli - pertucinogena - plecoglossicida - poae - pohangensis - proteolytica - pseudoalcaligenes - psychrophila - psychrotolerans - putida - rhizosphaerae - rhodesiae - salomonii - savastanoi - simiae - sp. - straminea - stutzeri - synxantha - syringae - thermotolerans - thivervalensis - tremae - trivialis - umsongensis - vancouverensis - veronii - viridiflava - vranovensis - xanthomarina

Pseudonocardia
alaniniphila - alni - ammonioxydans - antarctica - asaccharolytica - aurantiaca - autotrophica - benzenivorans - chloroethenivorans - compacta - dioxanivorans - endophytica - halophobica - hydrocarbonoxydans - kongjuensis - nitrificans - oroxyli - petroleophila - saturnea - sp. - spinosispora - sulfidoxydans - tetrahydrofuranoxydans - thermophila - xinjiangensis - yunnanensis - zijingensis

Pseudoramibacter
alactolyticus

Pseudorhodobacter
ferrugineus

Pseudospirillum
japonicum

Pseudoxanthomonas
broegbernensis - daejeonensis - japonensis - kalamensis - kaohsiungensis - mexicana - suwonensis

Psychrobacter
adeliensis - alimentarius - aquaticus - aquimaris - arenosus - cibarius - faecalis - frigidicola - glacincola - immobilis - marincola - maritimus - namhaensis - nivimaris - phenylpyruvicus - proteolyticus - salsus - submarinus - urativorans - vallis

Psychroflexus
gondwanensis

Psychromonas
antarctica - arctica

Psychroserpens
burtonensis

Pullulanibacillus
naganoensis

Pusillimonas
noertemannii

Pyrobaculum
aerophilum - arsenaticum - islandicum - oguniense - organotrophum

Pyrococcus
furiosus - horikoshii - woesei

Pyrodictium
abyssi - brockii - occultum

Pyrolobus
fumarii

Pyxicoccus
fallax