ammonites
Clade Echinacea Claus 1876 (sea urchin)

Echinoidea - Euechinoidea

Alternative spelling: Echinideae

Full reference: C. F. W. Claus. 1876. Grundzüge der Zoologie. 3rd edition. N. G. Elwertsche Universitätsbuchhandlung, Marburg & Leipzig 1-1254

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

Sister taxa: Acroechinoidea, Desorella, Diadematacea, Echinothurioida, Galeroclypeus, Infraclypeus, Loriolella, Menopygus, Serpianotiaroida, Triadocidaridae, Triadotiaroida

Subtaxa: Arbacioida, Besairecidaris, Bramus, Camarodonta, Crinocidaris, Glyphopneustidae, Orthopsida, Plesiocidaroida, Stomopneustoida

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Ecology: epifaunal grazer-deposit feeder