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Hippasteria

Asteroidea - Valvatida - Goniasteridae

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).

Synonymy list
YearName and author
1840Hippasteria Gray
1841Hippasteria Forbes
1966Hippasteria Spencer and Wright p. U58
1992Hippasteria Clark and Downey p. 246
2002Hippasteria Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Life
Ambulacraria
phylumEchinodermata
subphylumAsterozoa
RankNameAuthor
classAsteroidea
subclassAmbuloasteroidea
infraclassNeoasteroidea()
superorderValvatacea
orderValvatida
familyGoniasteridae
genusHippasteria

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
A. M. Clark and M.E. Downey 1992A 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.