|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Asteroidea - Kermasida - Permasteridae
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 D. R. Elliott 2003||Primary circlet ossicles enlarged relative to adjacent ossicles; interradials, radials, approximately equisized; "extraneous" or "x" ossicles not recognized. carinals in single series, ossicles not abutted; no lateral series. Marginals in single series, moderately robust, equidimensional, cuneate, forming angular arm margin; adambulacral inset, not part of arm margin.|