Basal Echinozoans (Taxonomic Rank: Group)
Extinct ancestral echinoderms including members of the Blastozoa, Edrioasteroidea, Cystoidea, Homalozoa, Ophiocistioidea, Helicoplacoidea, Cyclocystoidea, Edrioblastoidea, and Camptostromoidea.

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= Extinct Life Forms   = Living Creatures   = Fictional Beasts   = Inanimate Objects   = Ethereal Entities    = At least one collectible is catalogued