Echinoidea - Irregularia

Full reference: K. A. von Zittel. 1879. Handbuch der Palaeontologie 1(1):1-765

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

See also Berndt 2003, Clark and Twitchell 1915, Larrain and Biró-Bagóczky 1985, Squires 1984 and Squires 1987

Sister taxa: Echinoneoida, Holectypoida, Microstomata, Pygasteridae

Subtaxa: Acrolusiidae Asternata Aulacopygus Collyritidae Disasteridae Holasteroida Notidisaster Orbigniana Pycnasterides Spatangoida Sternata Tithoniidae

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Ecology: epifaunal grazer-deposit feeder

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