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Rhynchopygus d'Orbigny 1856 (sea urchin)

Echinoidea - Cassiduloida - Cassidulidae

PaleoDB taxon number: 33253

Parent taxon: Cassidulidae according to P. M. Kier 1966

Sister taxa: Echanthus, Hypsopygaster, Nucleopygus, Ochetes, Rhyncholampas, Stigmatopygus

Subtaxa: Rhynchopygus arumaensis

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Ecology: slow-moving semi-infaunal detritivore