Parent taxon: Echinodermata according to H. H. Beaver et al. 1967
See also Guensburg and Sprinkle 2003
Sister taxa: Argonevis, Aspidocrinites, Blastozoa, Camptostromoidea, Carpoidea, Cincta, Corneotuba, Cornuvacites, Ctenocystoidea, Ctenoimbricata, Cyclocystoidea, Echinosphaera, Edrioasteroidea, Eleutherozoa, Erinea, Fanerocoelia, Helicocystitidae, Helicoplacoidea, Homalozoa, Iheringiana, Limolepis, Nemotapis, Paracrinozoa, Pediculacaudinidae, Pelmatozoa, Radimonis, Scoteinocystis, Scutellidae, Scutellinidae, Stylophora, Tubocaudinidae, Venerella
Subtaxa: none
Distribution:
• Miocene of Italy (1 collection)
• Carboniferous of United States (3: California, Pennsylvania)
• Devonian of United States (1: New York)
Total: 5 collections each including a single occurrence