Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy   Age range and collections

Platyasterida

Asteroidea - Platyasterida

Synonymy list
YearName and author
1951Platyasterida Spencer p. 122
1957Platyasterida Lehmann p. 77
1965Platyasterida Owen p. 559
1966Platyasterida Spencer and Wright p. U42
1989Platyasterida Blake p. 212
1994Platyasterida Blake p. 125
2002Platyasterida Sepkoski, Jr.
2007Platyasterida Blake p. 1477
2007Platyasterida Blake and Rozhnov p. 521

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

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
W. K. Spencer 1951The adambulacralia and ambulacralia are almost in one plane and the adambulacralia fail to form a well-defined wall to th egroove. The oral surface of the arm is broad and flat.