|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Asteroidea - Hemizonida - Helianthasteridae
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.
|R. V. Kesling 1982||As for the family, by monotypy.|
|D. B. Blake 2009||Twenty-eight-armed helianthasterid. Primary ossicles of dorsal skeleton apparently limited to comparatively robust, disklike, spine-bearing carinal series. Adambulacrals bearing series of three spines. Circumoral longer than next ambulacral. Pedicellariae of two distinct size classes, valves three. MAO spines not recognized.|