Echinoidea - Irregularia

Full reference: A. B. Smith. 1981. Implications of lantern morphology for the phylogeny of post-Palaeozoic echinoids. Palaeontology 24:779-801

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

See also Kiessling 2003 and Smith 1981

Sister taxa: Desorellidae, Galeropygidae, Hyboclypus, Pygorhytis

Subtaxa: Apatopygidae Archiaciidae Bothryopneustes Cassiduloida Clypeasteroida Clypeidae Clypeolampadidae Echinolampadoida Nucleolitidae Pygaulidae

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Ecology: epifaunal grazer-deposit feeder

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