|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||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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|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.|