Basic info | Taxonomic history | Classification | Relationships |
Morphology | Ecology and taphonomy | Age range and collections |
Urasterella
Asteroidea - Platyasterida - Urasterellidae
Taxonomy
Urasterella was named by McCoy (1851) [Sepkoski's age data: O Llde C Mosc Sepkoski's reference number: 248]. It is the type genus of Urasterellidae.
It was assigned to Uractinida by Sepkoski (2002); to Urasterellinae by Dean Shackleton (2005); and to Urasterellidae by Schuchert (1915), Spencer (1918), Withers and Keble (1934), Lehmann (1957), Owen (1965), Spencer and Wright (1966) and Blake and Rozhnov (2007).
It was assigned to Uractinida by Sepkoski (2002); to Urasterellinae by Dean Shackleton (2005); and to Urasterellidae by Schuchert (1915), Spencer (1918), Withers and Keble (1934), Lehmann (1957), Owen (1965), Spencer and Wright (1966) and Blake and Rozhnov (2007).
Synonyms
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Synonymy list
Year | Name and author |
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1851 | Urasterella McCoy p. 59 |
1886 | Roemeraster Stürtz p. 85 |
1886 | Palasteracanthion Stürtz p. 153 |
1915 | Urasterella Schuchert pp. 173-178 |
1918 | Urasterella Spencer pp. 135-137 |
1934 | Urasterella Withers and Keble p. 234 |
1950 | Phillipaster Spencer |
1957 | Urasterella Lehmann pp. 127-128 |
1965 | Urasterella Owen p. 565 |
1965 | Phillipsaster Owen p. 566 |
1966 | Phillipsaster Spencer and Wright p. U71 |
1966 | Urasterella Spencer and Wright p. U71 |
2002 | Phillipaster Sepkoski, Jr. |
2002 | Urasterella Sepkoski, Jr. |
2005 | Urasterella Dean Shackleton p. 99 |
2007 | Urasterella Blake and Rozhnov p. 524 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Diagnosis
Reference | Diagnosis | |
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J. Dean Shackleton 2005 | Adjacent adambulacrals overlap; inferomarginals of paxillate morphology. |