Urasterella is an extinct genus of sea stars that lived from the Ordovician to the Devonian. Its fossils are known from Europe, North America and southern Africa.
Species There have been a number of species assigned or transferred to the genus since its description in 1851.Paleobiology Database The Paleobiology Database Urasterella entry
U. asperrimus U. asperula (syn. Protasteracanthion primus) U. biradialis (syn. Salteraster biradialis) U. constellata U. coronella (syn. Salteraster coronella) U. creswelli U. grandis U. gutterfordensis U. huxleyi U. imbricatus (syn. Salteraster imbricatus) U. montana U. pulchella U. ruthveni U. selwyni (syn. Salteraster selwyni) U. thraivensis U. ulrichi
Sources
External links Urasterella (syn. Roemeraster) in the Field Museum's Evolving Planet