''Petrostroma'' is a genus of
sponge
Sponges, the members of the phylum Porifera (; meaning 'pore bearer'), are a basal animal clade as a sister of the diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through t ...
s belonging to the family
Minchinellidae.
Fossil species of this genus are found in Europe,
but the extant type species, ''P. schulzei'', is found in
Sagami Bay,
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...
.
[Vacelet, Jean, et al. "Order Lithonida Vacelet, 1981, Recent." Systema Porifera. Springer, Boston, MA, 2002. 1185-1192.]
Species:
* ''Petrostroma schulzei''
Döderlein, 1892
References
{{Taxonbar, from=Q18520279
Calcaronea
Sponge genera