Astraeospongia
noun
As·traeo·spon·gia
¦astrē(ˌ)ōˈspənjēə,
-pän-
: a genus of saucer-shaped Silurian fossil sponges having 6-rayed stellate spicules and important as Paleozoic index fossils
Word History
Etymology
New Latin, from astraeo- (from Greek astraios starry, from aster-, astēr star) + -spongia