Gastropoda - Neogastropoda - Buccinidae
Alternative spellings: Trophon (Trophonopsis), Trophonopsis
Parent taxon: Neptunea according to Dall 1919
See also Chiesa et al. 1995, Hickman 1980 and Sepkoski 2002
Sister taxa: Neptunea (Neptunea), Neptunea (Sulcosipho), Neptunea alaquaensis, Neptunea altispira, Neptunea cretacea, Neptunea despecta, Neptunea diminuta, Neptunea gracilis, Neptunea humerosa, Neptunea lyrata, Neptunea modestoidea, Neptunea stonei
Subtaxa: Trophonopsis platacantha
Distribution:
• Quaternary of Ireland (1 collection), Italy (1), United States (1: California)
• Pliocene of Italy (1), Japan (1)
• Oligocene of Denmark (1), France (9), United States (2: Washington)
• Eocene of United States (9: Oregon)
• Paleocene of Greenland (3)
Total: 29 collections including 34 occurrences