Subgenus Petrosia (Petrosia) Vosmaer, 1885

Museums

Regional Maps

• [Schmidtia] Balsamo Crivelli, G. 1863. Di alcuni Spongiari del Golfo di Napoli. Atti della Societa Italiana di Scienze Naturali 5: 284-302 pls 4-6 [291] [junior homonym of Schmidtia Volborth, 1860 (Mollusca)].

  Type species:

   Reniera dura Nardo, 1833 by subsequent designation, see Schmidt, E.O. 1864. Supplement der Spongien des adriatischen Meeres. Enthaltend die Histiologie und systematische Ergänzungen. Leipzig : Engelmann 48 pp. 4 pls. [42].
• Petrosia Vosmaer, G.C.J. 1885. Porifera. In Bronn, H.G. Die Klassen und Ordnungen des Thierreichs 2: 177-368 pls 19-25 [338] [nom. nov. for Schmidtia Balsamo-Crivelli, 1863].

Distribution

States

New South Wales, Queensland, Western Australia

IBRA and IMCRA regions

IMCRA

Central Western Shelf Transition (28), Central Western Shelf Province (29), Southeast Shelf Transition (37), Central Eastern Shelf Province (38), Northeast Shelf Province (40), Northeast Shelf Transition (41), Central Western Transition (5)

Diagnosis

Petrosia with a tangential specialised ectosomal unispicular network, and a very dense lamellate-isotropic choanosomal skeletal network of thickly crowded spicule tracts producing rounded meshes, forming layers parallel to the surface. A dense interstitial reticulation of free spicules gives the sponge a stony texture. Megascleres at least two distinct size categories of oxeote or strongylote spicules. Microscleres absent. (Emended from Van Soest 1980 and
De Weerdt 1985)

ID Keys

See Family Petrosiidae Diagnosis

Diagnosis References

Desqueyroux-Faundez, R. & Valentine, C. 2002. Family Petrosiidae Van Soest, 1980. pp. 906-917 in Hooper, J.N.A. & van Soest, R.W.M. (eds). Systema Porifera: A guide to the classification of sponges. New York : Kluwer Academic/Plenum Publishers Vol. 1. [912]

History of changes