Pachygrapsus, Genus
Paguridae, Familia
Pagurus, Genus
Palaemon, Genus
Palaemonetes, Genus
Palaemonidae, Familia
Pandalidae, Familia
Pandalina, Genus
Pandalus, Genus
Paracypris, Genus
Paradoxostoma, Genus
Paradoxostomatidae, Familia
Paragnathia, Genus
Parajassa, Genus
Parametaphoxus, Genus
Paramphilochoides, Genus
Paramunna, Genus
Paramunnidae, Familia
Paramysis, Genus
Paranthuridae, Familia
Paraphoxus, Genus
Parapleustes, Genus
Paratanaidae, Familia
Pariambus, Genus
Paromola, Genus
Parthenopea, Genus
Peltocoxa, Genus
Peltogaster, Genus
Peltogastrella, Genus
Peltogastridae, Familia
Peracarida, Superorder
Perioculodes, Genus
Perrierella, Genus
Petalosarsia, Genus
Photis, Genus
Phoxocephalidae, Familia
Phoxocephalus, Genus
Phoxus Kröyer, 1842 (homonym)
– synonym of Phoxocephalus, Genus
Phtisica, Genus
Phyllocarida, Superorder
Pilumnus, Genus
Pinnotheres, Genus
Pinnotheridae, Familia
Pinnotherion, Genus
Pirimela, Genus
Pisa, Genus
Pisidia, Genus
Planes, Genus
Platorchestia, Genus
Platycyamus, Genus
Pleocyemata, Subordo
Pleurocrypta, Genus
Pleurogonidae, Familia
Pleurogoniidae, Familia
Pleurogonium, Genus
Pleustidae, Familia
Pleusymtes, Genus
Podoceridae, Familia
Podocerus, Genus
Podocopida, Ordo
Podocopina, Subordo
Polybius, Genus
Pontocrates, Genus
Pontocyprididae, Familia
Pontocypris, Genus
Pontocythere, Genus
Pontophilus, Genus
Pontoporeiidae, Familia
Porcellana, Genus
Porcellanidae, Familia
Portumnus, Genus
Portunidae, Familia
Portunion, Genus
Praunus, Genus
Proboloides, Genus
Processa, Genus
Processidae, Familia
Prodajus, Genus
Propontocypris, Genus
Protomedeia, Genus
Pseudione, Genus
Pseudoarachne, Genus
Pseudocuma, Genus
Pseudocumidae, Familia
Pseudocythere, Genus
Pseudoparatanais, Genus
Pseudoprotella, Genus
Pseudorchestoidea, Genus
Pseudotanaidae, Familia
Pseudotanais, Genus
Pterygocythereis, Genus