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Girvanaster
Taxonomy
Girvanaster was named by Spencer (1916) [Sepkoski's age data: O Ashg-m]. Its type is Girvanaster sculptus.
It was synonymized subjectively with Protopalaeaster by Owen (1965).
It was assigned to Hudsonasterinae by Spencer and Wright (1966); to Pustulosida by Sepkoski (2002); and to Hudsonasteridae by Dean Shackleton (2005) and Blake (2018).
It was synonymized subjectively with Protopalaeaster by Owen (1965).
It was assigned to Hudsonasterinae by Spencer and Wright (1966); to Pustulosida by Sepkoski (2002); and to Hudsonasteridae by Dean Shackleton (2005) and Blake (2018).
Species
G. sculptus (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1916 | Girvanaster Spencer p. 70 |
| 1966 | Girvanaster Spencer and Wright p. U50 |
| 2002 | Girvanaster Sepkoski |
| 2005 | Girvanaster Dean Shackleton p. 100 |
| 2018 | Girvanaster Blake p. 38 |
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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 | |
|---|---|---|
| J. Dean Shackleton 2005 | Primary interradials with interradial projections pointing centrally; greater than three adambulacrals abutting against axillary; axillary diamond-shaped. |