Order Clypeasteroida Agassiz 1836 (sand dollar)

Echinoidea - Clypeasteroida

Full reference: L. Agassiz. 1836. Prodrome d'une monographie des radiaires ou échinodermes. Mémoires de la Société des Sciences Naturelles de Neuchâtel 1:168-199

Parent taxon: Neognathostomata according to A. Kroh and A. B. Smith 2010

See also Clark 1904, Linder et al. 1988 and Sepkoski 2002

Sister taxa: Apatopygidae, Archiaciidae, Bothryopneustes, Cassiduloida, Clypeidae, Clypeolampadidae, Echinolampadoida, Nucleolitidae, Pygaulidae

Subtaxa: Botriopygus Clypeasterina Conoclypeidae Durhamella Faujasiidae Hesperaster Laganina Leniechinus Lenita Oligopygidae Pentedium Plesiolampadidae Proescutella Prowillungaster Rotulina Runa Scutellina Tournoueraster Willungaster

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Ecology: slow-moving semi-infaunal detritivore

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