Echinoidea - Euechinoidea

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: Euechinoidea according to A. B. Smith 1995

See also Durham and Melville 1957 and Fell 1966

Sister taxa: Acroechinoidea, Echinacea, Echinothurioida, Galeroclypeus, Loriolella, Serpianotiaroida, Triadocidaridae, Triadotiaroida

Subtaxa: Pygasteroida

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Ecology: epifaunal grazer-deposit feeder

Distribution: found only at Crystal River Limestone (Eocene of Florida)

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