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Platanaster
Taxonomy
Platanaster was named by Spencer (1919) [Sepkoski's age data: O Cara-l Sepkoski's reference number: 2]. Its type is Platanaster ordovicus.
It was assigned to Platyasterida by Sepkoski (2002); to Palasteriscinae by Dean Shackleton (2005); to Palasteriscidae by Owen (1965), Spencer and Wright (1966), Blake (1994) and Blake and Rozhnov (2007); and to Platanasteridae by Spencer (1919) and Blake (2018).
It was assigned to Platyasterida by Sepkoski (2002); to Palasteriscinae by Dean Shackleton (2005); to Palasteriscidae by Owen (1965), Spencer and Wright (1966), Blake (1994) and Blake and Rozhnov (2007); and to Platanasteridae by Spencer (1919) and Blake (2018).
Species
P. ordovicus (type species)
Synonymy list
| Year | Name and author |
|---|---|
| 1919 | Platanaster Spencer p. 171 |
| 1965 | Platanaster Owen p. 559 |
| 1966 | Platanaster Spencer and Wright p. U42 |
| 1994 | Platanaster Blake p. 125 |
| 2002 | Platanaster Sepkoski |
| 2005 | Platanaster Dean Shackleton p. 95 |
| 2007 | Platanaster Blake and Rozhnov p. 521 |
| 2018 | Platanaster Blake p. 49 |
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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 | |
|---|---|---|
| D. B. Blake 1994 | Platanasterid with a large disk, relatively narrow ambulacrals, and broad adambulacrals; the channels for the radial and transverse water vascular canals are large and deep; podial basins are close to the arm axis and occupy nearly the full ambulacral width. | |
| J. Dean Shackleton 2005 | Axillary separated from marginal ring by pair of internal inferomarginals. |
Measurements
No measurements are available
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| Source: f = family, c = class, p = phylum | |||||
| References: Blake 1994, Aberhan 1992, Aberhan et al. 2004 | |||||