Gastropoda - Naticoidea - Naticidae

Alternative spelling: Amaurellina (Crommium)

Parent taxon: Ampullospirinae according to M. D. Perrilliat et al. 2006

Sister taxa: Amauropsis, Gyrodes, Lacunaria, Tejonia

Subtaxa: Crommium andersoni, Crommium globosa, Crommium masinguiensis, Crommium palmasensis, Crommium palmerae, Crommium perovatum, Crommium pinyonensis, Crommium pseudowillemeti, Crommium rouaulti, Crommium willemettii

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Type: Ampullaria willemettii

Ecology: slow-moving shallow infaunal carnivore