Paenibacillus
alginolyticus - alvei - amylolyticus - antarcticus - apiarius - borealis - chibensis - chitinolyticus - chondroitinus - cineris - cookii - curdlanolyticus - dendritiformis - durus - ehimensis - favisporus - glucanolyticus - graminis - hongkongensis - illinoisensis - kobensis - lactis - larvae - lautus - lentimorbus - macerans - macquariensis - mendelii - odorifer - pabuli - peoriae - phyllosphaerae - polymyxa - rhizosphaerae - sp. - thiaminolyticus - validus - wynnii - xylanilyticus

Palleronia
marisminoris

Pandoraea
apista - norimbergensis - pnomenusa - pulmonicola - sputorum

Pannonibacter
phragmitetus

Pantoea
agglomerans - ananatis - citrea - dispersa - punctata - sp. - stewartii

Paracoccus
denitrificans - zeaxanthinifaciens

Paralactobacillus
selangorensis

Parascardovia
denticolens

Pasteurella
multocida - pneumotropica

Paucimonas
lemoignei

Pectobacterium
atrosepticum - betavasculorum - cacticida - carotovorum - cypripedii

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

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

Pelistega
europaea

Pelomonas
saccharophila

Peptostreptococcus
anaerobius

Persicobacter
diffluens

Phaeospirillum
fulvum - molischianum

Phenylobacterium
falsum - immobile

Photobacterium
angustum - damselae - iliopiscarium - indicum - leiognathi - phosphoreum - profundum - rosenbergii

Phyllobacterium
catacumbae - myrsinacearum - trifolii

Pigmentiphaga
kullae

Planococcus
citreus - kocurii

Planomicrobium
okeanokoites

Plantibacter
flavus

Plesiomonas
shigelloides

Pontibacter
actiniarum

Porphyromonas
asaccharolytica

Pragia
fontium

Prevotella
bivia

Prolinoborus
fasciculus

Promicromonospora
citrea

Promyxobacterium
flavum

Propionibacterium
acidipropionici - acnes - avidum - freudenreichii - granulosum - jensenii - propionicus - sp. - thoenii

Propioniferax
innocua

Propionimicrobium
lymphophilum

Proteus
hauseri - inconstans - mirabilis - rettgeri - vulgaris

Providencia
stuartii

Pseudoalteromonas
aliena - citrea - elyakovii - espeijana - flavipulchra - haloplanktis - issachenkonii - maricaloris - mariniglutinosa - nigrifaciens - paragorgicola - piscicida - prydzensis - ruthenica - translucida - undina

Pseudoclavibacter
helvolus

Pseudomonas
abietaniphila - aeruginosa - agarici - alcaligenes - amygdali - anguilliseptica - antarctica - argentinensis - asplenii - aurantiaca - avellanae - azotogensis - balearica - beijerinckii - beteli - boreopolis - cannabina - caricapapayae - caudata - chlororaphis - cichorii - cissicola - citronellolis - coenobios - congelans - coronafaciens - corrugata - costantinii - cruciviae - dacunhae - dehalogenans - deva - extremorientalis - flavescens - flectens - floridana - fluorescens - fragi - frederiksbergensis - fulgida - fulva - fuscovaginae - gasotropha - geniculata - gingeri - hibiscicola - jessenii - jinjuensis - koreensis - lundensis - lutea - luteola - marginalis - membranula - mendocina - mephitica - migulae - monteilii - mucidolens - multiresinivorans - myxogenes - oceanica - oleovorans - oryzihabitans - palleroniana - pavonacea - perolens - pertucinogena - pictorum - poae - proteofaciens - proteolytica - pseudoalcaligenes - psychrotolerans - putida - reptilovora - resinovorans - rhizosphaerae - rhodesiae - rimaefaciens - savastanoi - septica - sp. - stereotropis - stutzeri - synxantha - syringae - taetrolens - thermotolerans - tolaasii - tremae - trivialis - umsongensis - vancouverensis - veronii - viridiflava

Pseudonocardia
autotrophica

Pseudorhodobacter
ferrugineus

Pseudospirillum
japonicum

Pseudoxanthomonas
kaohsiungensis

Psychrobacter
fozii - glacincola - immobilis - luti - phenylpyruvicus - proteolyticus - urativorans

Psychroflexus
gondwanensis - torquis

Psychromonas
profunda