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Urasterella Temporal range: 460.5–388.1 Ma PreЄ Є O S D C P T J K Pg N Ordovician to Devonian[1] Urasterella asperula Scientific classification Kingdom: Animalia Phylum: Echinodermata Subphylum: Eleutherozoa Class: Asteroidea Order: Platyasterida Family: Palasteriscidae Subfamily: Urasterellinae Genus: Urasterella McCoy (1851) Species see text Synonyms Palasteracanthion Phillipaster Protasteracanthion Roemeraster Salteraster Ulrichaster Urasterella is an extinct genus of brittle star that lived from the Ordovician to the Devonian.[1] Its fossils are known from Europe, North America and southern Africa.[1] Species There have been a number of species assigned or transferred to the genus since its description in 1851.[1] 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 ^ a b c d The Paleobiology Database Urasterella entry Urasterella (syn. Roemeraster) in the Field Museum's Evolving Planet This prehistoric echinoderm-related article is a stub. You can help Wikipedia by expanding it.v · d · e