|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
Asteroidea - Hemizonida - Helianthasteridae
It was assigned to Lepidasteridae by Schuchert (1915); to Taeniactininae by Spencer (1927) and Lehmann (1957); to Helianthasterinae by Owen (1965); to Hemizonida by Sepkoski (2002); and to Helianthasteridae by Spencer and Wright (1966) and Blake (2009).
|Year||Name and author|
|1864||Helianthaster Roemer p. 147 figs. pl. 28|
|1915||Helianthaster Schuchert p. 159|
|1927||Helianthaster Spencer pp. 386-388|
|1957||Helianthaster Lehmann pp. 89-91|
|1965||Helianthaster Owen p. 561|
|1966||Helianthaster Spencer and Wright p. U65|
|2002||Helianthaster Sepkoski, Jr.|
|2009||Helianthaster Blake p. 304|
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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 2009||Sixteen-armed helianthasterid. Primary ossicles of dorsal skeleton delicate, appearing differentially developed among individuals; these can be locally reduced or absent. Carinals not developed. Adambulacrals bearing single spine. Circumoral about the same length as next ambulacral. Only small pedicellariae present, valves two. Four or more long, robust spines at proximal tip of MAO.|