†Stigmatopygus (Cyrtoma) McClelland 1840 (sea urchin)
Echinoidea - Cassiduloida - Cassidulidae
Alternative spelling: Cyrtoma
Parent taxon: Stigmatopygus according to Mortensen 1948
Sister taxa: Stigmatopygus lamberti, Stigmatopygus pulchellus
Subtaxa: none
Ecology: slow-moving semi-infaunal detritivore
Distribution: there are no occurrences of Stigmatopygus (Cyrtoma) in the database