Paracaudina ransonetti – synonym of Paracaudina chiliensis
Pentacta coerulea – synonym of Pentacta quadrangularis
Pentacta tuberculosa – synonym of Pentacta anceps
Pentacta tuberculosus – synonym of Pentacta anceps
Pentathyone mirabilis – synonym of Havlockia versicolor
Phyllophorella, Subgenus (Phyllophorus)
Phyllophorus trapezus – synonym of Phyrella trapeza
Phyllothuria, Subgenus (Phyllophorus)
Platyperona, Subgenus (Holothuria)
Pseudocaudina australis – synonym of Paracaudina australis
Pseudocaudina ransonetti – synonym of Paracaudina chiliensis
Pseudocucmis intercedens – synonym of Mensamaria intercedens
Pseudocucumis acicula – synonym of Cladolabes acicula
Pseudocucumis africana – synonym of Afrocucumis africana
Pseudocucumis eurystichus – synonym of Mensamaria intercedens
Pseudocucumis th̩li Рsynonym of Afrocucumis africana