Petrosia Vosmaer, 1885

Rocha, Lívia, Moraes, Fernando, Salani, Sula & Hajdu, Eduardo, 2021, Taxonomy of Petrosiidae Van Soest, 1980 (Haplosclerida, Porifera) from Brazil, Zootaxa 5004 (2), pp. 251-287 : 262

Genus Petrosia Vosmaer, 1885

Petrosiidae with an ectosomal triangular or polygonal reticulation of spicule tracts or single spicules, usually echinated at the nodes or along the tracts by a smaller category of spicules. Choanosomal skeleton basically a lamellate-isotropic reticulation of spicule tracts, and an interstitial unispicular reticulation. Megascleres with distinct size categories of strongyles or oxeas, often with a special category of ectosomal microxeas (Desqueyroux- Faúndez & Valentine 2002).