|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Ophiuroidea - Cheiropterasteridae
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||Disk covered with homogeneous skin, unplated, flexible (i.e., cloth-like in terms of folding), star-shaped, embayed between arms; arms long, tapering over distal third; Ambb alternating, with midradial line of junction zigzag in ventral view, with short wing for articulation of Adamb near midlength, subquadrate, not boot-shaped in ventral view, with groove dorsally on abradial side in radial (proximal-distal) direction. Adambb with four or more short stout spines ventrally; groove for nerve ring on Ambbl as a deep cleft; Ambb2 expanded distally over short, wedge-shaped Ambb3 and Ambb4; with two large pits in groove for water vascular ring.|