- Peraclis rissoides
- Peraclis triacantha
- Peraclis valdiviae
- peroni
- peroni
- Phylliroe atlantica
- Phylliroe bucephala
- plana
- Planktomya henseni
- Platybrachium antarcticum
- Pneumoderma atlanticum atlanticum atlanticum
- Pneumoderma atlanticum boasi
- Pneumoderma atlanticum pacificum
- Pneumoderma atlanticum souleyeti
- Pneumoderma degraaffi
- Pneumoderma heronensis
- Pneumoderma mediterraneum
- Pneumoderma meisenheimeri
- Pneumoderma peroni heterocotylum
- Pneumodermopsis brachialis
- Pneumodermopsis canephora
- Pneumodermopsis ciliata
- Pneumodermopsis macrochira
- Pneumodermopsis macrocotyla
- Pneumodermopsis michaelsarsi
- Pneumodermopsis minuta
- Pneumodermopsis oligocotyla
- Pneumodermopsis paucidens paucidens
- Pneumodermopsis polycotyla
- Pneumodermopsis pupula
- Pneumodermopsis simplex
- Pneumodermopsis spoeli
- Pneumodermopsis teschi
- Protatlanta souleyeti
- Pruvotella danae
- Pruvotella pellucida
- Pterosoma planum
- Pterotrachea coronata
- Pterotrachea hippocampus
- Pterotrachea minuta
- Pterotrachea scutata
- pulex
- pulsata
- pulsatapusilla
- pulsatoides
- pygmaeum
- pyramidata
- rangi
- Recluzia bensoni
- Recluzia erythraea