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Platanaster

Asteroidea - Platyasterida - Palasteriscidae

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 is the type genus of Platanasteridae.

It was assigned to Platanasteridae by Spencer (1919); to Platyasterida by Sepkoski (2002); to Palasteriscinae by Dean Shackleton (2005); and to Palasteriscidae by Owen (1965), Spencer and Wright (1966), Blake (1994) and Blake and Rozhnov (2007).

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, Jr.
2005Platanaster Dean Shackleton p. 95
2007Platanaster Blake and Rozhnov p. 521

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
RankNameAuthor
subphylumAsterozoa
classAsteroidea
orderPlatyasterida
familyPalasteriscidae
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.

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.