(Petroderma) (Petroderma) is a biological genus in the family Ralfsiaceae and order Ectocarpales.
Petroderma maculiforme
Diplura
Endoplura
Hapalospongidion
Hapterophycus
Lithoderma
Petroderma
Pseudolithoderma
Ralfsia
Sorapion
Symphyocarpus