- Pachycrommium japonicum
- pachyderma, Globigerina
- pachyderma, Neogloboquadrina
- Pachydiscus, genus
- pacifica, Burseolina
- pacifica, Calyptogena
- pacifica, Cassidulina
- Pacific oyster
- Pacific scallop
- Padus ssiori
- Pagrus, genus
- Painted maple
- Palaeoactinommids
- Palaeoaplysina, genus
- palaeocrenata, Fagus
- palaeodiabolicum, Acer
- Palaeofusulina, genus
- palaeojaponicum, Sapium
- Palaeoleperditia fukujiensis
- Palaeoloxodon, genus
- Palaeoloxodon namadicus aomoriensis
- Palaeoloxodon namadicus naumanni
- Palaeoloxodon namadicus yabei
- Palaeoloxodon naumanni
- palaeopentaphylla, Pinus
- palaeorufinerve, Acer
- Palaeostylus, genus
- Palaeozygopleura, genus
- Paleodictyon majus
- paleoezoensis, Cervus
- Paleoparadoxia, genus
- Paleoparadoxia tabatai
- Paleostylus, genus
- Paleotapirus, genus
- Paleozygopleura, genus
- Palinandromeda, genus
- paliurus, Cyclocarya
- Paliurus nipponicus
- Paliurus protonipponicus
- paliurus, Pterocarya
- pallida, Euspira
- pallida, Niveotectura
- Palliolum (Delectopecten) peckhami
- Palliolum murayamai
- Palliolum peckhami
- palmaeformis, Cordaites
- palmarosae, Chicoreus
- Palmate maple
- palmatum, Acer
- palmatum var. amoenum, Acer
- palmatum subsp. matsumurae, Acer
- palmatus f. palmatus, Rubus
- palmatus, Rubus
- palmatus, Rubus palmatus
- pamphyliensis, Guembelastraea
- panda, Megacardita
- panda, Venericardita
- Pandora, genus
- Pandora (Kennerlia), genus
- Pandora (Kennerlia) wardiana
- Pandora pulchella
- Pandora wardiana
- Pandorella wardiana
- Panicled hydrangea
- paniculata, Elliottia
- paniculata, Hydrangea
- Paniculous supplejack
- Panomya elongata
- Panomya simotomensis
- Panopea, genus
- Panopea japonica
- Panopea nomurae
- Pantanellium, genus
- Panthera, genus
- Panthera pardus
- Panthera tigris
- Panthera youngi
- Paper nautilus
- Paphia, genus
- Paphia amabilis
- Paphia naganumana
- Paphia schnelliana
- Paphia undulata
- Paphia vernicosa
- Papilio maackii
- papua, Geloina
- papyracea, Clementia
- Papyridea harrimani
- Papyridea kurodai
- Parabenzoin protopraecox
- Paracalamites takahashii
- Paraceratites, genus
- Parachaetetes, genus
- Paraclathurella gracilenta
- Paracytheridea neolongicaudata
- Paradeltocyathus orientalis
- Paradentalium hexagonum
- paradoxica, Codonofusiella
- Paradrillia inconstans
- Paradusta hungerfordi hungerfordi
- Parafusulina, genus
- Parafusulina ambigua
- Parafusulina edoensis
- Parafusulina japonica
- Parafusulina kaerimizensis
- Parafusulina kaerimizuensis
- Parafusulina kawaii
- Parafusulina kinosakii
- Parafusulina matsubaishi
- Parafusulina mizutanii
- Parafusulina truncata
- Parafusulina yabei
- Paragloborotalia siakensis
- Paragondolella navicula
- Paraheteraster macroholcus
- Parahsuum simplum
- Paraipciphyllum, genus
- Paraleptolepis elegans
- Paraleptolepis kikuchii
- Parallelodon obsoletiformis
- parallelus, Arges
- paramammontheus shigensis, Mammuthus
- Paramormula paucicostulata
- Parancistrolepis fujitai
- Parapanope genus
- paraplebejus, Mizuhopecten
- paraplebejus, Patinopecten
- Parapuzosia ambigua
- Parapuzosia (Austiniceras) ambigua
- Paraschwagerina, genus
- Parasoltree
- Parasphenophyllum thonii var. minor
- Parastegodon, genus
- Parastegodon akashiensis
- Parastegodon sugiyamai
- Paratapes undulata
- Paratrechina, genus
- Paratrizygia maiyaensis
- pardus, Panthera
- Parentactinia nakatsugawaensis
- parkeri, Quinqueloculina
- Parrotia fagifolia
- Parrotia pristina
- parrotioides, Hamamelis
- Parthenocissus tricuspidata
- parthenopeus, Monoplex
- parva, Cymbella
- Parvamussium alaskense
- Parvamussium intuscostatum
- Parvamussium yasudae
- Parvamussium yubarense
- parva, Propebela
- Parvicingula, genus
- Parviconus tuberculosus
- parviflora, Pinus
- parvula, Nilssonia
- parvula, Nilssonia schaumburgensis
- parvum, Cocconema
- Pasture cockchafer
- Patanga, genus
- Patellogastropod
- Patellogastropoda, subclass
- Patelloida pygmaea
- Patinopecten, genus
- Patinopecten chichibuensis
- Patinopecten egregius
- Patinopecten ibaragiensis
- Patinopecten iwasakiensis
- Patinopecten kagamianus
- Patinopecten kagamianus subsp. moniwaensis
- Patinopecten kanbaraensis
- Patinopecten kimurai
- Patinopecten kimurai nakosoensis
- Patinopecten kintaichiensis
- Patinopecten (Kotorapecten) kagamianus
- Patinopecten (Kotorapecten) yamasakii
- Patinopecten kurosawaensis
- Patinopecten (Masudapecten) iwasakiensis
- Patinopecten (Masudapecten) kintaichiensis
- Patinopecten (Mizuhopecten) chichibuensis
- Patinopecten (Mizuhopecten) tokyoensis
- Patinopecten (Mizuhopecten) tokyoensis sematensis
- Patinopecten paraplebejus
- Patinopecten shibaharensis
- Patinopecten tokunagai
- Patinopecten tokyoensis
- Patinopecten tokyoensis hokurikuensis
- Patinopecten tokyoensis sematensis
- Patinopecten tryblium
- Patinopecten yamasakii
- Patinopecten yamasakii kintaichiensis
- Patinopecten yessoensis
- Patinopecten yessoensis yokoyamai
- Patrinia, genus
- paucicostata, Cyclocardia
- paucicostatum, Ainoceras
- paucicostatum, Jouaniceras
- paucicostulata, Paramormula
- paucicostulata, Turbonilla
- pauciloculata, Cyclammina
- pauciloculata, Cystammina
- Paulownia, genus
- paulucciae, Dendostrea
- pauxilla, Crassatella
- pauxillus, Crassatellites
- Pavona cactus
- Pavona frondifera
- pavoninum, Flabellum
- peckhami, Delectopecten
- peckhami, Palliolum
- peckhami, Pecten
- Pecopteris, genus
- Pecten, genus
- Pecten albicans
- Pecten albicans naganumanus
- Pecten (Azumapecten), genus
- Pecten cowperi var. yubarensis
- Pecten erythrocomatus
- Pecten (Eupecten) ussuricus
- Pecten excavatus
- Pecten farreri
- Pecten naganumanus
- Pecten peckhami
- Pecten (Propeamussium) cowperi var. yubarensis
- pecten, Ptilophyllum
- Pecten puncticulatus
- Pecten randolphi
- Pecten sinensis
- Pecten sinensis puncticulatus
- Pecten ussuricus
- pectinata, Atrina
- Pectinia lactuca
- Pectinia lactuca japonica
- peculiaris, Terebratulina
- pediculus, Amphora
- pediculus, Amphora ovalis
- Pedinoblatta ishidae
- pedunculatus, Equisetostachys
- Pegophysema bialata
- Pelagornithidae, family
- Pelecypoda, class
- pellicula, Raeta
- pellicula, Raetina
- Pencil smelt
- Pendaloma otohimeae
- pendula, Alnus
- penicillata, Dosinella
- penicillata, Dosinia
- Penitella, genus
- Penitella gabbii
- Pennahia, genus
- pensilis, Glyptostrobus
- Pentactinocarpus fusiformis
- pentamerum, Rhododendron metternichii
- Pentatoma semiannulata
- Pentatomidae, family
- Père David's deer
- perfoliatus, Potamogeton
- peripheroacuta, Fohsella
- peripheroacuta, Globorotalia
- peripheroronda, Globorotalia
- Periploma, genus
- Periploma (Aelga) besshoense
- Periploma besshoense
- Periploma mitsuganoense
- Periploma yokoyamai
- Periplomya, genus
- Perisphinctes, genus
- Perisphinctes (Kranaosphinctes) matsushimai
- Perisphinctes matsushimai
- Perisphinctes ozikaensis
- Perispyridium, genus
- permiana, Goniarina
- Permoperna hayamii
- Permoperna trapezoidalis
- Pernopecten, genus
- pernula, Nuculana
- pernula sadoensis, Nuculana
- pernuloides, Nuculana
- Peronidia venulosa
- Peronidia zyonoensis
- Perotrochus eocenicus
- Perotrochus otoensis
- Perotrochus yoshiwarai
- perplexus, Fusinus
- Perrottetia notoensis
- perryi, Volutharpa
- Persicaria, genus
- Persicaria thunbergii
- Persimmon
- perterebra, Turritella
- pestigris, Planostrea
- Petalodus, genus
- Petaurista, genus
- Petaurista leucogenys
- petiolaris, Hydrangea
- Petricola, genus
- Petricola aequistriata
- Petricolirus, genus
- Petromyzonti, class
- Petrophyton miyakoense
- pexa, Nodella
- pexus, Malloproductus
- Phacoceras, genus
- Phacops nonakai
- Phacosoma, genus
- Phacosoma chikuzenensis
- Phacosoma hataii
- Phacosoma japonicum
- Phacosoma kawagensis
- Phacosoma suketoensis
- Phacosoma troscheli
- Phaeophyceae, class
- Phalium, genus
- Phalium flammiferum
- Phaneroceras kesslerense
- Phaneroptera, genus
- Pharaonella, genus
- Pharidae, family
- Phaxas izumoensis
- Phellodendron, genus
- Phellodendron amurense
- Phellodendron amurensis
- Philadelphus satsumi
- Philine, genus
- philippinarum, Ruditapes
- Phillipsia ohmoriensis
- Philyra heterograna
- phlebotrichum, Viburnum
- Phlyctiderma, genus
- Phocoena, genus
- Pholadidae, family
- Pholadomya, genus
- Pholadomya brevitesta
- Pholadomya (Bucardiomya) brevitesta
- Pholadomya turunagai
- Phos iwakianus
- Phos minoensis
- Phragmites, genus
- Phragmites australis
- Phragmites communis
- Phricodothyris, genus
- Phricodothyris asiatica
- Phyllites bambusoides
- Phylloceras, genus
- Phyllonotus, genus
- Phyllostachys bambusoides
- Physeter, genus
- Physophyllia ayleni
- Picea, genus
- Picea alcokiana
- Picea bicolor
- Picea glehnii
- Picea jezoensis
- Picea jezoensis subsp. hondoensis
- Picea kaneharai
- Picea kanoi
- Picea koribai
- Picea koyamae
- Picea latibracteata
- Picea maximowiczii
- Picea miocenica
- Picea polita
- Picea shirasawae
- Picea torano
- Picea ugoana
- picta, Pictothyris
- Pictodentalium, genus
- Pictodentalium vernedei
- Pictothyris picta
- pictum ssp. dissectum f. dissectum, Acer
- pictum ssp. glaucum, Acer
- pictum ssp. mono, Acer
- pictus, Kalopanax
- Pike conger
- pila ovata, Euspira
- pila ovata, Lunatia
- Pillucina, genus
- Pillucina pisidium
- Pillucina yamakawai
- Pilot whale
- pilsbryi, Glycymeris
- Pimplinae, subfamily
- Pine
- Pink family
- Pinna, genus
- Pinna sandsfootensis
- Pinna socialis
- Pinniped
- Pinnipedia, infraorder
- Pinnularia, genus
- Pinnularia borealis
- Pinnularia brebissonii var. diminuta
- Pinnularia crabro
- Pinnularia gibba var. linearis
- Pinnularia obscuriformis
- Pinnularia ovalis
- Pinpoint lampfish
- Pinophyta, phylum
- Pinus, genus
- Pinus densiflora
- Pinus fujiii
- Pinus koraiensis
- Pinus mesothunbergii
- Pinus mikii
- Pinus miocenica
- Pinus oishii
- Pinus palaeopentaphylla
- Pinus parviflora
- Pinus protodiphylla
- Pinus thunbergii
- Pinus trifolia
- Pirenella, genus
- Pirenella alata
- Pirenella cingulata
- Pirenella yatsuoensis
- pisidium, Pillucina
- pisifera, Chamaecyparis
- Pistacia miochinensis
- pistillata, Stylophora
- Pitar, genus
- Pitar ashiyaensis
- Pitar itoi
- Pitar kyushuensis
- Pitar japonicus
- Pitar lineolatus
- Pitar matsumotoi
- Pitar takashimensis
- Pityophyllum longifolium
- Placamen, genus
- placentula, Cocconeis
- placentula var. euglypta, Cocconeis
- placentula f. rostrata, Navicula
- placentula var. rostrata, Placoneis
- Placocoenia, genus
- Placocoenia tosaensis
- Placoneis placentula var. rostrata
- Placopecten akihoensis
- Placopecten magellanicus
- Placopecten (Nipponopecten) akihoensis
- Placopecten (Nipponopecten) protomollitus
- Placopecten (Nipponopecten) wakuyaensis
- Placopecten nomurai
- Placopecten protomollitus
- Placopecten wakuyaensis
- Placunanomia macrochisma ezoanus
- Plafkerium, genus
- Plagiogramma, genus
- Plagiostoma, genus
- Planera ezoana
- Planera ungeri
- planicostulatus, Mizuhopecten
- Planoglabratella opercularis
- Planostrea pestigris
- Plantago, genus
- Plantain
- Planulina, genus
- Planulina wuellerstorfi
- planus, Isurus
- Platanus, genus
- Platanus aceroides
- Platanus septentrionalis
- Plateumaris, genus
- Plateumaris constricticollis
- Plateumaris sericea
- Platichthys miostellatus
- platycarpa, Cladrastis
- Platycarya, genus
- Platyceramus eozensis
- Platyceramus higoensis
- platycerata, Trapa
- Platygyra, genus
- Platylambrus, genus
- Platynini, tribe
- platyphylla, Betula
- platypoda, Fraxinus
- platyptycha, Tapes
- platyptychus, Tapes
- Plecia adiastola
- Plecoptera, order
- Pleioblastus argenteostriatus
- Pleioblastus chino
- Pleioblastus chino var. chino
- pleistoceaca, Sapium sebiferum
- pleistoceaca, Triadica sebifera
- Plerophyllum hidense
- Plesioacirsa chitaniana
- Plesiosauria, order
- Plesiotexanites kawasakii
- Pleurocerid
- Pleuroceridae, family
- Pleurogrammatodon, genus
- Pleuronectidae, family
- Pleuroploca trapezium
- Pleurosmilia, genus
- Pleurotoma, genus
- Pleurotoma braunsi
- Pleurotoma (Drillia) braunsi
- Pleurotomaria, genus
- Pleurotomaria propehirasei
- Pleurotomaria yokoyamai
- Pleurotomaria yoshiwarai
- Pleurotomariidae, family
- Plicarcularia bellula
- plicata, Cristaria
- plicata spatiosa, Cristaria
- Plicatula, genus
- plicatula, Liralucina
- Plicifusus, genus
- Plicifusus agumensis
- Plicifusus plicatus
- Plicifusus scissuratus
- Plotopteridae, family
- plumosa, Luzula
- Plum yew
- Poaceae, family
- Poacites, genus
- pocilliformis, Pterotrigonia
- Podabacia elegans
- Podabacia elegans subsp. lobata
- Podabacia elegans subsp. lobata forma vanderhorsti
- Podobursa, genus
- Podocarpaceae, family
- Podocarpium podocarpum
- podocarpum, Podocarpium
- Pododesmus macrochisma
- Podogonium knorri
- podolskiensis, Ivanovia
- podophylla, Rodgersia
- Podozamites, genus
- Podozamites distans var. osawae
- Podozamites lanceolatus
- Podozamites reinii
- Podozamites schenki
- poeyanum, Cribroelphidium
- Polinices, genus
- Polinices meisensis
- Polinices sagamiensis
- polita, Picea
- polyandra, Euptelea
- Polychaeta, class
- Polychaete
- Polycotylus, genus
- polygama, Actinidia
- polygnathiformis, Gondolella
- polygona, Quinqueloculina
- Polygonum cuspidatum
- Polygonum thunbergii
- Polymesoda, genus
- Polymesoda (Isodomella) shiroiensis
- Polymesoda naumanni
- Polymesoda radiatostriata
- Polymesoda shiroiensis
- polymeris, Choerospondias axillaris
- polymeris, Spondias axillaris
- Polymorphina, genus
- Polynemamussium alaskense
- Polynemamussium yasudae
- polynyma, Mactromeris
- Polyplacophora, genus
- Polyporaceae, family
- Polypore
- Polyptychoceras, genus
- Polyptychoceras haradanum
- Polyptychoceras (Polyptychoceras) subquadratum
- Polyptychoceras subquadratum
- polystichoides, Woodsia
- Polystichum tripteron
- Polystomellina discorbinoides
- Pomacentridae, family
- Pomacentrus, genus
- pompilioides, Melonis
- ponderosa, Cucullaea
- Pophornbeam
- Poplar
- Populus, genus
- Populus balsamoides
- Populus emarginata
- Populus eowightiana
- Populus latior
- Populus sanbonsugii
- Populus suaveolens
- Populus tremula var. sieboldii
- Porcelain crab
- Porcellanidae, family
- Porifera, phylum
- poronaica, Turritella
- Porterius sp.
- Porterius dalli
- Portlandella japonica
- Portlandella ovata
- Portlandella watasei
- Portlandia, genus
- Portlandia (Acilana), genus
- Portlandia (Acilana) tokunagai
- Portlandia (Acilana) tokunagai var. hayasakai
- Portlandia chehalisensis
- Portlandia gratiosa
- Portlandia japonica
- Portlandia kakimii
- Portlandia lischkei
- Portlandia (Megayoldia) thraciaeformis
- Portlandia ovata
- Portlandia (Portlandella) japonica
- Portlandia (Portlandella) ovata
- Portlandia (Portlandella) watasei
- Portlandia (Portlandia) chehalisensis
- Portlandia thraciaeformis
- Portlandia tokunagai
- Portlandia tokunagai var. hayasakai
- Portlandia toyamaensis
- Portlandia watasei
- posterocostatus, Caudites
- posterocostatus, Hermanites
- postostriata, Securella
- Potamides bacula
- Potamides ishiiana
- Potamides notoensis
- Potamides yokoyamai
- Potamides yokoyamai forma japonica
- Potamides (Vicarya) yokoyamai
- Potamides (Vicarya) yokoyamai forma japonica
- Potamides (Vicaryella) bacula
- Potamides (Vicaryella) ishiiana
- Potamides (Vicaryella) notoensis
- Potamidid
- Potamididae, family
- Potamocorbula, genus
- Potamocorbula amurensis
- Potamogeton, genus
- Ptamogeton gramineus
- Ptamogeton gramineus subsp. heterophyllus
- Potamogeton maackianus
- Potamogeton perfoliatus
- Potentilla fragarioides
- Potentilla fragarioides var. major
- Pourthiaea villosa
- Pourthiaea villosa var. laevis
- praecox, Lindera
- praedimorpha, Denticulopsis
- praedorsalis, Aokiichthys
- praegilva, Cyclobalanopsis
- praematuratus, Nassarius
- praenipponicus, Cervus
- praenipponicus, Nipponicervus
- Praeorbulina circularis
- Praeorbulina curva
- Praeorbulina glomerosa
- Praeorbulina glomerosa subsp. circularis
- Praeorbulina sicana
- Praeorbulina transitoria
- praerupta, Psammacoma
- praesignis, Amussiopecten
- praetexta, Macoma
- praetexta oinomikadoi, Macoma
- praetexta, Praetextellina
- Praetextellina praetexta
- Prantlia biloba
- Pravitoceras sigmoidale
- Premocyathus compressus
- Premocyathus dentiformis
- prespadices, Siphonalia
- prevostiana, Fulgoraria
- prevostiana, Fulgoraria megaspira
- Priene oregonensis
- primaria, Protosequoia
- Primates, order
- primigenius, Mammuthus
- primotinus, Diplomystus
- princeps, Artemisia
- principalis, Drillia
- Prionailurus bengalensis subsp. chinensis
- Prionocidaris, genus
- priscus, Carcharhinus
- pristina, Parrotia
- Pristiophoridae, family
- Pristiterebra bifrons ugariensis
- Pristiterebra tsuboiana
- Privet
- Proboscidea, genus
- Procellariidae, family
- Proclava kaneharai
- Proclava tokiensis
- Procolpochelys? susensis
- Procyclolites triadicus
- procyonoides, Nyctereutes
- Productus, genus
- profundacella, Psammocora
- Profundiconus tuberculosus
- Profulvia kurodai
- Profusulinella, genus
- Profusulinella fukujiensis
- prolongatus, Miodontiscus
- prolongatus nakamurai, Miodontiscus
- Propeamussium, genus
- Propeamussium cowperi var. yubarensis
- Propeamussium fuganjiensis
- Propeamussium sibogai
- Propeamussium tateiwai
- Propeamussium yubarense
- Propebela parva
- Propebela yokoyamai
- propehirasei, Pleurotomaria
- Protaetia orientalis
- Protexanites fukazawai
- protoambigua, Rhus
- protoaurorae, Stegodon
- Protocallithaca adamsi
- Protocyprina naumanni
- protodentata, Quercus
- protodiphylla, Pinus
- protoermanii, Betula
- protoglobispica, Betula
- Protogrammoceras nipponicum
- protohirsuta, Alnus
- protojaponica, Camellia
- protojaponica, Tilia
- protojaponica, Ulmus
- protomammonteus, Mammuthus
- protomaximowiczii, Alnus
- protomiyabei, Acer
- protomollitus, Nipponopecten
- protomollitus, Placopecten
- protonipponicus, Paliurus
- protoobassia, Styrax
- protopalifera, Meimuna
- protoparvifolia, Ulmus
- protopraecox, Lindera
- protopraecox, Parabenzoin
- Protorotella, genus
- Protorotella depressa
- Protorotella hayashii
- Protorotella yuantaniensis
- protosalicina, Quercus
- Protosequoia primaria
- protoserrata, Quercus
- protostenoptera, Pterocarya
- Protothaca, genus
- Protothaca euglypta
- Protothaca jedoensis
- Protothaca tateiwai
- Protunuma, genus
- prunifolia, Spiraea
- Prunus, genus
- Prunus apetala
- Prunus jamasakura
- Prunus leveilleana
- Prunus maximowiczii
- Prunus nipponica
- Prunus rubeshibensis
- Prunus salicina
- Prunus sargentii
- Prunus spinulosa
- Prunus ssiori
- Prymnesiophyceae–Ô
- przewalskii, Equus ferus
- Przewalski's wild horse
- Psammacoma gubernaculum
- Psammocora profundacella
- Psammocora superficialis
- Psammotreta, genus
- `Psammotreta praerupta
- Psephaea, subgenus
- Psephaea yanagidaniensis
- Pseudamiantis, genus
- Pseudamiantis tauyensis
- Pseudamusium, genus
- pseudoadiantoides, Ginkgoites
- pseudoanderssoni, Pseudofusulina
- pseudoarenaria, Mya
- pseudobocki, Fusulinella
- pseudocamellia, Stewartia
- Pseudocardium, genus
- Pseudocardium sachalinensis
- pseudocarpinifolium, Acer
- Pseudochama retroversa
- Pseudocyclammina, genus
- Pseudodictyomitra, genus
- Pseudodoliolina, genus
- Pseudodoliolina ozawai
- Pseudodoliolina pseudolepida
- Pseudoendothyra, genus
- Pseudoetrema fortilirata
- pseudofastosum, Clinocardium
- Pseudofavosites, genus
- pseudoformosana, Salvinia
- Pseudofusulina, genus
- Pseudofusulina ambigua
- Pseudofusulina crassa
- Pseudofusulina japonica
- Pseudofusulina kraffti
- Pseudofusulina pseudoanderssoni
- Pseudofusulina vulgaris
- Pseudofusulinella, genus
- Pseudogramatodon dalli
- Pseudogramatodon dalli obliquata
- Pseudohaploceras japonicum
- Pseudohauerina fragilissima
- Pseudolarix, genus
- Pseudolarix japonica
- pseudolatidens, Eostegodon
- pseudolatidens, Stegolophodon
- pseudolepida, Pseudodoliolina
- Pseudoliotia, genus
- Pseudoliva japonica
- pseudolongifolia, Ulmus
- Pseudomelania elegantula
- pseudoneokomiense, Cymatoceras
- Pseudonoba yendoi
- Pseudononion japonicum
- pseudopachyderma, Globorotalia
- pseudopannus, Ophiodermella
- Pseudoparalegoceras kesslerense
- Pseudopavona, genus
- Pseudopecten, genus
- Pseudoperissolax yokoyamai
- Pseudophillipsia, genus
- Pseudophillipsia kiriuensis
- Pseudophillipsia kuzuensis
- Pseudophillipsia obtusicauda
- Pseudophillipsia spaculifera
- Pseudophorus, genus
- pseudoplana, Aphrodina
- pseudoplatanus, Acer
- Pseudopolymorphina, genus
- pseudoprincipalis, Inquisitor
- Pseudoristola, genus
- Pseudoromingeria, genus
- Pseudoschwagerina, genus
- Pseudoschwagerina minatoi
- Pseudoschwagerina morikawai
- Pseudostaffella, genus
- Pseudotsuga, genus
- Pseudotsuga japonica
- Pseudotsuga subrotunda
- pseudoungeriana, Cibicidoides
- pseudoungerianus, Cibicides
- psittacea var. woodwardi, Hemithiris
- psittacea var. woodwardi, Hemithyris
- Psygmophyllum, genus
- Psygmophyllum flabellatum
- Psygmophyllum maiyaense
- Pteridospermatophyta, phylum
- Pterinella shinoharai
- pterocarpa var. yezoensis, Mertensia
- Pterocarya, genus
- Pterocarya asymmetrosa
- Pterocarya ezoana
- Pterocarya multistriata
- Pterocarya paliurus
- Pterocarya protostenoptera
- Pterocarya rhoifolia
- Pterophyllum, genus
- Pteropod
- Pteropoda, order
- Pteropurpura adunca
- Pteropurpura falcata
- Pteropurpura falcata eurypteron
- Pterosaur
- Pterosauria, order
- Pterostichus, genus
- Pterostichus microcephalus
- Pterostyrax hispidus
- Pterotrigonia
- Pterotrigonia hokkaidoana
- Pterotrigonia pocilliformis
- Pterotrigonia (Pterotrigonia) hokkaidoana
- Pterotrigonia (Pterotrigonia) pocilliformis
- Pterotrigonia pustulosa
- Pterotrigonia sakakurai
- Ptilophyllum, genus
- Ptilophyllum pecten
- Ptilozamites, genus
- Ptychites, genus
- Pueraria, genus
- Pufferfish
- pugnator, Chilotherium
- pulchella, Epistominella
- pulchella, Pandora
- pulchella, Raeta
- pulchellus, Raetellops
- pulcherrimus, Hemicentrotus
- Pullenia apertura
- Pulleniatina obliquiloculata
- pumila, Trapa natans
- punctata, Nitzschia
- punctata, Tryblionella
- punctatus, Konosirus
- puncticulatus, Pecten
- puncticulatus, Pecten sinensis
- Puncturella, genus
- Puncturella fastigiata
- Puncturella nobilis
- Pupa strigosa
- pupoides, Eufenella
- pupoides, Finella
- Purplescent longhorn
- purpurata, Saxidomus
- purpuratus, Saxidomus
- purpurea, Brasenia
- purpurea, Leptastrea
- Purpuricenus, genus
- Pusia ebenus
- pusilla, Glomospira
- pustulosa, Pterotrigonia
- Putorius kuzuüensis
- Puzosia subcorbarica