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Petraster
Taxonomy
Petraster was named by Billings (1858) [Sepkoski's age data: O Aren-l O Ashg-m Sepkoski's reference number: 1066]. Its type is Palasterina rigidus. It is the type genus of Petrasteridae.
It was assigned to Pustulosida by Sepkoski (2002); to Asteroidea by Dean Shackleton (2005); to Petrasteridae by Spencer (1951), Owen (1965), Spencer and Wright (1966) and Blake et al. (2016); and to Palasterinidae by Schuchert (1915), Withers and Keble (1934) and Blake (2018).
It was assigned to Pustulosida by Sepkoski (2002); to Asteroidea by Dean Shackleton (2005); to Petrasteridae by Spencer (1951), Owen (1965), Spencer and Wright (1966) and Blake et al. (2016); and to Palasterinidae by Schuchert (1915), Withers and Keble (1934) and Blake (2018).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1858 | Petraster Billings p. 79 |
| 1899 | Uranaster Gregory p. 347 |
| 1915 | Petraster Schuchert pp. 138-141 |
| 1915 | Uranaster Schuchert pp. 154-155 |
| 1916 | Uranaster Spencer p. 105 |
| 1934 | Petraster Withers and Keble p. 227 |
| 1951 | Petraster Spencer p. 123 |
| 1965 | Petraster Owen p. 567 |
| 1966 | Petraster Spencer and Wright p. U43 |
| 2002 | Petraster Sepkoski |
| 2005 | Petraster Dean Shackleton p. 91 |
| 2016 | Petraster Blake et al. p. 167 |
| 2018 | Petraster Blake p. 28 |
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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.
G. †Petraster Billings 1858
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†Petraster americanus d'Orbigny 1850
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Invalid names: Asterias anthonii Dana 1863 [synonym], Palasterina jamesi Dana 1863 [synonym]
†Petraster angustior Withers and Keble 1934
†Petraster crozonensis Blake et al. 2016
†Petraster kinahani Baily 1878
†Petraster richi Withers and Keble 1934
†Petraster rigidus Billings 1857
†Petraster smythi McCoy 1874
Invalid names: Uranaster Gregory 1899 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. Dean Shackleton 2005 | Inferomarginals with virgal-like facets; actinals present; buccal slits present; axillary trapezoidal. |