†order Orthopsida Mortensen 1942 (sea urchin)

Echinoidea - Orthopsida

Alternative spelling: Orthopsina

Full reference: T. Mortensen. 1942. New Echinoidea (Camarodonta). Preliminary notice. Videnskabelige Meddelelsar Dansk Naturhistoriske Forening i KjĂžbenhavn 106:225-232

Parent taxon: Acroechinoidea according to A. B. Smith 1995

See also Fell and Pawson 1966 and Sepkoski 2002

Sister taxa: Aspidodiadematoida, Carinacea, Diadematoida, Micropygoida, Nicolleaumatidae, Pedinoida

Subtaxa: none

Ecology: slow-moving low-level epifaunal grazer

Distribution: there are no occurrences of Orthopsida in the database

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