Pa
, Paenibacillaceae , Paenibacillus , Palleronia , Paludibacter , Pandoraea , Pannonibacter , Pantoea , Papillibacter , Parabacteroides , Parachlamydia , Parachlamydiaceae , Paracoccus , Paracraurococcus , Paralactobacillus , Paraliobacillus , Parascardovia , Parasporobacterium , Parvibaculum , Parvularcula , Parvularculaceae , Parvularculales , Pasteurella , Pasteurellaceae , Pasteurellales , Pasteuria , Patulibacter , Patulibacteraceae , Paucibacter , Paucimonas , Paucisalibacillus
Pe
, Pectinatus , Pectobacterium , Pediococcus , Pedobacter , Pedomicrobium , Pelagibaca , Pelczaria , Pelistega , Pelobacter , Pelodictyon , Pelomonas , Pelospora , Pelotomaculum , Peptococcaceae , Peptococcus , Peptoniphilus , Peptostreptococcaceae , Peptostreptococcus , Peredibacter , Persephonella , Persicivirga , Persicobacter , Petrimonas , Petrobacter , Petrotoga
Ph
, Phaeobacter , Phaeospirillum
Phascolarctobacterium Del Dot et al., 1994
- Phascolarctobacterium faecium Del Dot et al. 1994
- Phascolarctobacterium succinatutens Watanabe et al., 2012
Bacteria → Firmicutes → Negativicutes → Selenomonadales → Acidaminococcaceae , Phenylobacterium , Phlomobacter , Phocoenobacter , Photobacterium , Photorhabdus , Phyllobacteriaceae , Phyllobacterium , Phytoplasma
Pi
, Pibocella , Pigmentiphaga , Pilibacter , Pilimelia , Pillotina , Pirellula , Piscirickettsia , Piscirickettsiaceae
Pl
, Planctomyces , Planctomycetaceae , Planctomycetacia , Planctomycetales , Planctomycetes , Planifilum , Planobispora , Planococcaceae , Planococcus , Planomicrobium , Planomonospora , Planotetraspora , Plantibacter , Pleomorphomonas , Plesiocystis , Plesiomonas
Po
, Polaribacter , Polaromonas , Polyangiaceae , Polyangium , Polymorphospora , Polynucleobacter , Pontibacillus , Pontibacter , Porphyrobacter , Porphyromonadaceae , Porphyromonas
Pr
, Pragia , Prauserella , Prevotella , Prevotellaceae
Procabacter Horn et al., 2002
Bacteria → Proteobacteria → Betaproteobacteria → Procabacterriales → Procabacteriaceae , Procabacteriaceae , Procabacteriales , Prolinoborus , Promicromonospora , Promicromonosporaceae , Propionibacteriaceae , Propionibacterium , Propionicicella , Propionicimonas , Propioniferax , Propionigenium , Propionimicrobium , Propionispira , Propionispora , Propionivibrio , Prosthecobacter , Prosthecochloris , Prosthecomicrobium , Proteiniphilum , Proteobacteria
Proteus Hauser, 1885
- Proteus hauseri O'Hara et al. 2000
- Proteus mirabilis Hauser 1885 (Approved Lists 1980)
- Proteus penneri Hickman et al. 1983
- Proteus vulgaris Hauser 1885 (Approved Lists 1980)
Bacteria → Proteobacteria → Gammaproteobacteria → Enterobacteriales → Enterobacteriaceae , Providencia
Ps
, Pseudaminobacter , Pseudidiomarina , Pseudoalteromonadaceae , Pseudoalteromonas , Pseudobutyrivibrio , Pseudocaedibacter , Pseudochrobactrum , Pseudoclavibacter , Pseudomonadaceae , Pseudomonadales , Pseudomonas , Pseudonocardia , Pseudonocardiaceae , Pseudoramibacter , Pseudorhodobacter , Pseudospirillum , Pseudovibrio , Pseudoxanthomonas , Psychrobacter , Psychroflexus , Psychroflexus , Psychromonadaceae , Psychromonas , Psychroserpens
Pu
, Pusillimonas
Py
, Pyxicoccus