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Platanaster

Asteroidea - Euaxosida - Platanasteridae

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).

Species
P. ordovicus (type species)

Synonymy list
YearName and author
1919Platanaster Spencer p. 171
1965Platanaster Owen p. 559
1966Platanaster Spencer and Wright p. U42
1994Platanaster Blake p. 125
2002Platanaster Sepkoski
2005Platanaster Dean Shackleton p. 95
2007Platanaster Blake and Rozhnov p. 521
2018Platanaster Blake p. 49

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Life
Deuterostomia
Ambulacraria
phylumEchinodermata
RankNameAuthor
subphylumEleutherozoa
Asterozoa()
classAsteroidea
orderEuaxosida
familyPlatanasteridae
genusPlatanaster

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. †Platanaster Spencer 1919
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Platanaster ordovicus Spencer 1919
Diagnosis
ReferenceDiagnosis
D. B. Blake 1994Platanasterid 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 2005Axillary separated from marginal ring by pair of internal inferomarginals.