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†class Helicoplacoidea Durham and Caster 1963

Helicoplacoidea

Full reference: J. W. Durham and K. E. Caster. 1963. Helicoplacoidea: a new class of echinoderms. Science 140(3568):820-822

Parent taxon: Echinodermata according to J. W. Durham and K. E. Caster 1963

See also Sepkoski 2002

Sister taxa: Argonevis, Aspidocrinites, Blastozoa, Camptostromoidea, Carpoidea, Cincta, Corneotuba, Cornuvacites, Crinozoa, Ctenocystoidea, Ctenoimbricata, Cyclocystoidea, Edrioasteroidea, Eleutherozoa, Erinea, Fanerocoelia, Helicocystitidae, Holothuroidea, Homalozoa, Iheringiana, Limolepis, Nemotapis, Paracrinozoa, Pediculacaudinidae, Pelmatozoa, Radimonis, Scoteinocystis, Scutellidae, Scutellinidae, Stylophora, Tubocaudinidae, Venerella

Subtaxa: Helicoplacida Helicoplacidae Polyplacida Westgardellidae

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Ecology: stationary low-level epifaunal suspension feeder

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