|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||Age range and collections|
It was reranked as the order Somasteroidea by Spencer (1951), Spencer and Wright (1966) and Sepkoski (2002); it was reranked as the order Somasteroida by Dean Shackleton (2005); it was reranked as the class Somasteroidea by Blake and Guensburg (1993) and Blake (2013).
It was assigned to Stelleroidea by Spencer and Wright (1966); to Stelleroidea by Blake and Guensburg (1993); to Echinodermata by Spencer (1951) and Sepkoski (2002); and to Asterozoa by Owen (1965), Blake (1989), Dean Shackleton (2005) and Blake (2013).
|Year||Name and author|
|1951||Somasteroidea Spencer p. 91|
|1965||Somasteroidea Owen p. 543|
|1966||Somasteroidea Spencer and Wright p. U39|
|1989||Somasteroidea Blake p. 211|
|1993||Somasteroidea Blake and Guensburg p. 106|
|2002||Somasteroidea Sepkoski, Jr.|
|2005||Somasteroida Dean Shackleton p. 64|
|2013||Somasteroidea Blake p. 355|
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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.