Parent taxon: Helicoidei according to P. Bouchet et al. 2017
See also Bouchet et al. 2005 and Harzhauser and Kowalke 2002
Sister taxon: Sagdoidea
Subtaxa: Camaenidae Elonidae Geomitridae Helicidae Helicodontidae Hygromiidae Pleurodontidae Polygyridae Sphincterochilidae Trissexodontidae
Ecology: epifaunal
Distribution:
• Quaternary of Algeria (3 collections), France (8), Germany (6), Greece (1), Hungary (1), Italy (1), Malta (1), Morocco (3), Spain (4), Thailand (1), Tunisia (1), United States (23: California, Florida, Texas, Virginia)
• Pliocene to Pleistocene of Italy (1), Spain (2)
• Pliocene of Indonesia (3), Spain (4)
• Miocene of Algeria (1), Austria (15), France (1), Germany (56), Greece (3), Grenada (4), Hungary (3), Italy (5), Poland (4), Portugal (1), Serbia and Montenegro (2), Spain (3), Switzerland (8)
• Oligocene to Miocene of United States (9: Florida, Montana)
• Oligocene of Switzerland (1)
• Eocene of the United Kingdom (1), United States (11: California, Texas, Wyoming)
• Cretaceous of Argentina (1), United States (1: Texas)
Total: 193 collections including 345 occurrences