Pr
- Prachynella
- Praebebalia
- Praeleptomesochra
- Praosia
- Praunus
- Presynaptiphilus
- Prethura
Priapion Giard & Bonnier, 1888
- Priapion fraissei (Giard & Bonnier, 1886)
Crustacea → Malacostraca → Isopoda → Epicaridea → Bopyroidea → Entoniscidae
Priapipilumnus Davie, 1989
- Priapipilumnus nimbus Davie, 1989
Crustacea → Malacostraca → Decapoda → Pilumnoidea → Pilumnidae → Pilumninae
Primno Guérin Méneville, 1836
- Primno abyssalis (Bowman, 1968)
- Primno brevidens Bowman, 1978
- Primno evansi Sheader, 1986
- Primno johnsoni Bowman, 1978
- Primno latreillei Stebbing, 1888
- Primno macropa Guérin Méneville, 1836
Crustacea → Malacostraca → Amphipoda → Phronimoidea → Phrosinidae
- Princaxelia
- Prionalpheus
- Prionocrangon
- Prionocypris
- Prionomysis
- Prionoplax
- Prionothelphusa
- Prionotoleberis
- Priscillina
- Priscosyrrhoe
- Prismatopus
- Proaeginina
- Proameira
- Proasellus
- Probeebei
- Probolisca
- Proboloides
- Probopyria
- Probopyrinella
- Probopyrione
- Probopyriscus
- Probopyrus
- Proboscinotus
- Probynia
- Procambarus
- Procampylaspis
- Procarididae
- Procaridoidea
- Procaris
- Procepon
- Proceroecia
- Processa
- Processidae
- Processoidea
- Prochelator
- Prochondracanthus
- Procythereis
- Prodajus
- Progebiophilus
- Progeryon
- Progeryonidae
Infrarazred Progymnoplea Lang, 1948
- Red Platycopioida
Crustacea → Multicrustacea → Copepoda
- Proharpinia
Projasus George & Grindley, 1964
- Projasus bahamondei Geroge, 1976
- Projasus parkeri (Stebbing, 1902)
Crustacea → Malacostraca → Decapoda → Macrura Reptantia → Achelata → Palinuridae
Prolanceola Woltereck, 1907
- Prolanceola vibiliformis Woltereck, 1907
Crustacea → Malacostraca → Amphipoda → Physosomata → Lanceoloidea → Lanceolidae
- Proleptochelia
- Prolutamator
- Prometopa
- Promysis
- Proneomysis
- Pronoe
- Pronoidae
- Pronotonyx
- Propagurus
- Prophryxus
- Propontocypris
- Propontonia
- Proporcellio
- Propseudione
- Prosaetes
- Proscina
- Proscinidae
- Prosekia
- Prosphorachaeus
- Prostebbingia
- Prostenothoe
Protallocoxa Schultz, 1978
- Protallocoxa abyssale (Wolff, 1962)
- Protallocoxa weddellensis Schultz, 1978
Crustacea → Malacostraca → Isopoda → Asellota → Stenetrioidea → Stenetriidae
- Protanais
Protanaissus Sieg, 1982
- Protanaissus huberti Błażewicz-Paszkowycz & Bamber, 2012
- Protanaissus longidactylus (Shiino, 1970)
Crustacea → Malacostraca → Tanaidacea → Tanaidomorpha → Paratanaoidea → Tanaissuidae
- Protella
- Protellidae
- Protellina
- Protelsonia
- Prothaumatelson
- Protoaeginella
- Protocerberus
- Protocharon
- Protocytheretta
- Protodactylina
- Protognathia
- Protognathiidae
- Protohadzia
- Protohaustorius
- Protojanira
- Protojaniridae
- Protojaniroides
- Protolafystius
- Protolatiremus
- Protomedeia
- Protonethes
- Protophoxus
- Protopsammotopa
- Protoradjia
- Protorchestia
- Protosphaeroniscus
- Protosquillidae
- Protracheoniscus
Protrachypene Burkenroad, 1934a
- Protrachypene precipua Burkenroad, 1934
Crustacea → Malacostraca → Decapoda → Penaeoidea → Penaeidae