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Hippasteria
Taxonomy
Hippasteria was named by Gray (1840) [Sepkoski's age data: K u R]. It is extant. It is the type genus of Hippasteriinae.
It was assigned to Hippasteriinae by Spencer and Wright (1966); to Goniasteridae by Forbes (1841) and Clark and Downey (1992); and to Valvatida by Sepkoski (2002).
It was assigned to Hippasteriinae by Spencer and Wright (1966); to Goniasteridae by Forbes (1841) and Clark and Downey (1992); and to Valvatida by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1840 | Hippasteria Gray |
| 1841 | Hippasteria Forbes |
| 1966 | Hippasteria Spencer and Wright p. U58 |
| 1992 | Hippasteria Clark and Downey p. 246 |
| 2002 | Hippasteria Sepkoski |
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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. Hippasteria Gray 1840
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†Hippasteria antiqua Fell 1956
†Hippasteria tuberculata Forbes 1852
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. M. Clark and M.E. Downey 1992 | A genus of Goniasteridae with abactinal plates with central granule, spines, tubercle, or pedicellaria, surrounded by smaller granules; secondary abactinal plates present, abundant large bivalve (clamshell) pedicellariae. |