†Petrozium Smith 1930 (horn coral)
Anthozoa - Stauriida - Entelophyllidae
PaleoDB taxon number: 5770
Parent taxon: Entelophyllidae according to D. Hill 1981
Sister taxa: Altaja, Entelophyllum, Evenkiella, Kysylagathophyllum, Medinophyllum, Migmatophyllum, Nanshanophyllum, Ornatophyllum, Prohexagonaria, Ramulophyllum, Scyphophyllum, Shensiphyllum, Tenuiphyllum, Trachyphyllum
Subtaxa: Petrozium losseni, Petrozium staufferi
Type: Petrozium losseni
Ecology: stationary epifaunal suspension feeder