Petraster

Petraster is a genus of extinct starfish that lived from the upper Ordovician to the late Silurian.^[2][3] The genus has a large distribution range, fossils have been found in North America, and Australia.^[3]

P. kinahani

Petraster Temporal range: 449.5–418.7 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Petraster sp.
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Asteroidea
Genus:	†Petraster Billings, 1858
Species[1]
†Coelaster americanus (d'Orbigny, 1850) †Palasterina kinahani (Baily, 1878) †Palasterina ramseyensis (Hicks, 1873) †Palasterina rigidus (Billings, 1857) †Petraster angustior Withers & Keble, 1934 †Petraster crozonensis Blake et al., 2016 †Petraster richi Withers & Keble, 1934 †Petraster smythi McCoy, 1874
Synonyms[2]
Uranaster Gregory, 1899