Gastropoda - Trochoidea - Turbinidae
Parent taxon: Homalopoma according to A. J. W. Hendy 2020
See also Pacaud and Le Renard 1995
Sister taxa: Homalopoma (Cantrainea), Homalopoma (Leptothyropsis), Homalopoma (Panacochlea), Homalopoma coombsi, Homalopoma degrangei, Homalopoma effingeri, Homalopoma granulosa, Homalopoma paucicostatum, Homalopoma sanguineus, Homalopoma umpquaensis, Homalopoma vancouverensis, Homalopoma wattsi
Subtaxa: Homalopoma (Homalopoma) baculum Homalopoma (Homalopoma) berryi Homalopoma (Homalopoma) luridum Homalopoma (Homalopoma) mimicum Homalopoma (Homalopoma) paucicostatum Homalopoma (Homalopoma) radiatum Homalopoma (Homalopoma) subobsoletum
Ecology: epifaunal grazer
Distribution:
• Quaternary of Mexico (10 collections), United States (50: California)
• Pliocene of United States (1: California)
• Eocene of Australia (1)
Total: 62 collections including 88 occurrences