Blastoidea

Parent taxon: Blastozoa according to C. D. Sumrall and J. Waters 2012

See also Sepkoski 2002

Sister taxa: Coronoidea, Diploporita, Eocrinoidea, Felbabkacystidae, Lepidocystidae, Parablastoidea, Paracrinoidea, Rhombifera, Rhombifera

Subtaxa: Fissiculata Granatocrinida Macurdablastus Pentremitida Spiraculata Troosticrinida

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Ecology: stationary intermediate-level epifaunal suspension feeder

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