Petraster
Petraster is a genus of extinct starfish that lived from the upper Ordovician to the late Silurian. The genus has a large distribution range, fossils have been found in North America, and Australia.
Petraster is a genus of extinct starfish that lived from the upper Ordovician to the late Silurian. The genus has a large distribution range, fossils have been found in North America, and Australia.