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Hemizonida

Asteroidea - Hemizonida

Synonyms
Synonymy list
YearName and author
1951Gnathasterina Spencer p. 122
1951Hemizonida Spencer p. 122
1957Gnathasterina Lehmann p. 80
1957Hemizonida Lehmann p. 80
1965Gnathasterina Owen p. 560
1965Hemizonida Owen p. 560
1966Hemizonina Spencer and Wright p. U43
1989Hemizonida Blake p. 213
2002Hemizonida Sepkoski, Jr.

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

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 form a defined wall. The buttressing skeleton is confined mainly to the arm axils and the ambulacral skeleton is the main arm skeleton.
W. K. Spencer 1951 (Gnathasterina)With conspicuous mout-anlgle plates.