- palatable
- palatal complex
- palate
- palatine bone
- palatine fenestra
- palatine foramen
- Palea
- pallida
- pallidipectoris
- pallidipes
- pani
- paracapsular sac
- paraphyletic
- parasphenoid
- paratype
- pardalis
- parietal bones
- parietalis
- parkeri
- paroccipitals
- parthenogenetically
- parvorder
- pectoral girdle
- pectoral scutes
- peguense
- pelagic
- Pelochelys
- Pelodiscus
- Pelomedusa
- peltifer
- Peltocephalus
- Pelusios
- pelvic girdle
- peninsularis
- pericentric inversion
- peripheral bones
- perixantha
- persica
- petersi
- phagocytosis
- phalanges
- phantastica
- pharynx
- phayrei
- pheromones
- philippeni
- Phrynops
- phylogeny
- picta
- pigment
- pileata
- pinocytosis
- Pinta Island
- Pinzón Island
- pivotal temperature
- planicauda
- planktonic
- plastral formula
- plastron
- Platemys
- platycephala
- platynota
- Platysternon
- pleural scutes
- Podocnemis
- poikilothermic
- polyphemus
- polyphyletic
- population
- postanal
- posterior
- posterior palatine foramen
- postfrontal
- postinguinale
- postlabial
- postlagenar hiatus
- postorbital bones
- postotic fenestra
- postoticum
- postzygapophyses
- praepalatine foramen
- preanal
- prearticular bones
- prefrontal bones
- prefrontal processes
- prefrontal-vomer
- prehensile
- premaxilla bones
- prenuchal bone
- primary spermatocytes
- pritchardi
- proboscis
- procoelous
- prootic bone
- protuberance
- Psammobates
- Pseudemydura
- Pseudemys
- pseudoaxillary
- pseudocellata
- pseudogeographica
- pterygoid
- pubic symphyses
- pubis
- pulcherrima
- pulchristriata
- punctata
- purvisi
- pygal bones
- Pyxidea
- Pyxis