†order Plesiocidaroida Duncan 1889 (sea urchin)

Echinoidea - Plesiocidaroida

Full reference: P. M. Duncan. 1889. A revision of the genera and great groups of the Echinoidea. Journal of the Linnean Society, Zoology 23:1-311

Parent taxon: Echinacea according to H. B. Fell and D. L. Pawson 1966

See also Sepkoski 2002

Sister taxa: Arbacioida, Besairiecidaris, Bramus, Camarodonta, Crinocidaris, Glyphopneustidae, Stirodonta, Stomopneustoida

Subtaxa: Tiarechinidae

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Ecology: slow-moving low-level epifaunal grazer

Distribution: found only at Cortina d'Ampezzo (Triassic of Italy)

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