Pseudalius, [135], [142], [163]

Pseudaxine, [73]

Pseudoceridae, [19], [20]

Pseudoceros, [19], [20]

Pseudocotyle, [73]

Pseudorhynchus bifidus, [49]

Psygmobranchus, [341]

Pterobranchia, [461]

Pterodina, [200], [201], [203], [206], [211], [215], [216], [225], [226], [230]

Pterodinidae, [201], [225]