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|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Asteroidea - Cryptozonia - Schoenasteridae
It was synonymized subjectively with Euzonosoma by Harper and Morris (1978); it was reranked as Schoenaster by Meek and Worthen (1866), Schuchert (1915), Jell (1997) and Sepkoski (2002).
It was assigned to Palasterina by Meek and Worthen (1860); to Palasterinidae by Meek and Worthen (1866); to Schoenasteridae by Schuchert (1915); to Encrinasteridae by Jell (1997); and to Oegophiurida by Sepkoski (2002).
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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.
|P. Jell 1997||Large, 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.|