- Promysis atlantica
- Pronoe capito
- Protatlanta souleyeti
- Protocruzia pigerrima
- Protocystis acornis
- Protocystis balfouri
- Protocystis bicornuta
- Protocystis bicuspis
- Protocystis harstoni
- Protocystis heterocentrota
- Protocystis macleari
- Protocystis micropelecus
- Protocystis murrayi
- Protocystis sloggetti
- Protocystis swirei
- Protocystis thomsoni
- Protocystis triangularis
- Protocystis tridens
- Protocystis varians
- Protopelagonemertes hubrechti
- Protorhabdonella curta
- Protorhabdonella simplex
- Pseudeuphausia latifrons
- Pseudevadne tergestina
- Pseudochirella batillipa
- Pseudochirella dubia
- Pseudochirella hirsuta
- Pseudochirella mawsoni
- Pseudochirella obtusa
- Pseudochirella pustulifera
- Pseudochirella spectabilis
- Pseudochirella spinosa
- Pseudocohnilembus pusillus
- Pseudocubus obeliscus
- Pseudodiaptomus acutus
- Pseudodiaptomus charteri
- Pseudodiaptomus gracilis
- Pseudodiaptomus hessei
- Pseudodiaptomus marshi
- Pseudodiaptomus nudus
- Pseudodiaptomus richardi
- Pseudodiaptomus serricaudatus
- Pseudodiaptomus trihamatus
- Pseudolithium bifidum
- Pseudolithium compressum
- Pseudomma calmani
- Pseudomma magellanensis
- Pseudomma minutum
- Pseudorhombila octodentata
- Pseudorhombila quadridentata