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Protothyraster priscus
Taxonomy
Rhopia prisca was named by de Loriol (1874). Its type specimen is Muséum d'Histoire Naturelle de Genève A VII-84-28131 and is a 3D body fossil. It is the type species of Protothyraster.
It was recombined as Protothyraster priscus by Hess (1970), Hess (1974), Gale (2011) and Fau and Villier (2023).
It was recombined as Protothyraster priscus by Hess (1970), Hess (1974), Gale (2011) and Fau and Villier (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1874 | Rhopia prisca de Loriol p. 18 figs. pl. 2 fig. 2 |
| 1970 | Protothyraster priscus Hess p. 4 fig. 4 |
| 1974 | Protothyraster priscus Hess p. 658 |
| 2011 | Protothyraster priscus Gale p. 60 |
| 2023 | Protothyraster priscus Fau and Villier p. 8 figs. fig. 4 |
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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.
†Protothyraster priscus de Loriol 1874
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. Fau and L. Villier 2023 | Sea star with five narrow arms and a relatively small disc. Disc composed of a primary central plate covered with granules and a primary circle of five primary interradials and five primary radials slightly set distally. Arms with one central and regular row of carinal plates. Carinals large, overlapping a row of abactinal plates, on both sides. Two marginal plate series present. A few actinals present proximally. Adambulacrals and ambulacrals weakly compressed. Adambulacrals bearing three spines. Adoral carina composed of the single, most proximal adambulacral of each row. |