Alternative spellings: Chrysodomus (Sulcosipho), Sulcosipho
Parent taxon: Neptunea according to U. S. Grant, IV and H. R. Gale 1931
See also Hendy 2020, Sepkoski 2002 and Waterfall 1929
Sister taxa: Neptunea (Neptunea), Neptunea (Trophonopsis), Neptunea alaquaensis, Neptunea cretacea, Neptunea despecta, Neptunea diminuta, Neptunea gracilis, Neptunea humboldtiana, Neptunea ithia, Neptunea lyrata, Neptunea modestoidea, Neptunea stonei
Subtaxa: Neptunea (Sulcosipho) angulata Neptunea (Sulcosipho) eatoni Neptunea (Sulcosipho) lawsoni Neptunea (Sulcosipho) magna Neptunea (Sulcosipho) postplanatus Neptunea (Sulcosipho) scotiaensis Neptunea (Sulcosipho) tabulata
Ecology: epifaunal
Distribution:
• Quaternary of United States (37: California, Oregon collections)
• Pliocene to Pleistocene of United States (2: California, Oregon)
• Pliocene of Belgium (2), the United Kingdom (1), United States (8: California, Oregon)
• Miocene to Pliocene of United States (1: California)
• Miocene of United States (3: Alaska, California, Washington)
Total: 54 collections including 57 occurrences