|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Somasteroidea - Chinianasteridae
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.
|J. Dean Shackleton 2005||Inferomarginals non-articulating; one inferomarginal to one ambulacral ossicle over entire arm; virgal length less than or equal to half of ambulacral width.|