†Petridiostroma Stearn 1992 (sponge)
Stromatoporoidea - Clathrodictyida - Gerronostromatidae
Parent taxon: Gerronostromatidae according to C. W. Stearn et al. 1999
Sister taxa: Gerronodictyon, Gerronostroma
Subtaxa: Petridiostroma incrustatum, Petridiostroma parsimplex, Petridiostroma regulare
Ecology: stationary epifaunal suspension feeder-photosymbiotic