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Schoenaster

Asteroidea - Cryptozonia - Schoenasteridae

Synonymy list
YearName and author
1860Palasterina (Schoenaster) Meek and Worthen p. 449
1866Schoenaster Meek and Worthen p. 278
1915Schoenaster Schuchert pp. 202-204 figs. pl. 32, 33, 35
1997Schoenaster Jell p. 309
2002Schoenaster Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
Ambulacraria
phylumEchinodermata
RankNameAuthor
subphylumAsterozoa
classAsteroidea
orderCryptozonia
superfamilySchuchertiacea
familySchoenasteridae
genusSchoenaster()

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
P. Jell 1997Large, with wide arms tapering uniformly. Disk with dorsal surface of polygonal plates, extending to arm tips, each plate with granular ornament; ventral interradii covered by polygonal imbricate plates that bear numerous long stout spines. Ambb short (rad.), with raised ridges along proximal and distal margins dorsally, boot-shaped in ventral view with long toe. Adambb expanded abradially, bearing two long stout spines dorsally and a row of smaller spines ventrally. Strong mouth frame with enlarged Ambb2 and torus on proximal face of Ambbl bearing fine spines.