|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Asteroidea - Trichasteropsida
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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.
|D. B. Blake and H. Hagdorn 2003||Neoasteroidea with disk relatively large, body thickened, arms gradually tapering, arched; arm tips rounded. Marginals in single series, morphologically differentiated from ossicles of adjacent ossicles. Distal marginals at least weakly enlarged in most specimens. Abactinal surface where known at least weakly reticulated, with transverse and longitudinal series enclosing areas of smaller, irregular(?) ossicles. Actinal ossicles numerous, robust, in multiple series forming a triangular field terminating along the arms but not reaching terminal. Actinal-surface spines on adambulacrals, actinals of at least some species spines uniform, robust, conical or flattened; ambulacrals, adambulacrals not otherwise differentiated. Pedicellariae unknown.|