Infraorder Orthalicoidei (slug)
Parent taxon: Helicina according to P. Bouchet et al. 2017
Sister taxa: Arionoidei, Clausilioidei, Helicoidei, Limacoidei, Oleacinoidei, Plectopyloidea, Punctoidea, Pupilloidei, Rhytididae, Rhytidoidei, Succineoidei, Testacelloidea, Urocoptoidea
Subtaxa: Orthalicoidea
Ecology: epifaunal
Distribution:
• Quaternary of United States (1: Texas collection)
• Miocene of Colombia (1), Peru (1)
• Oligocene to Miocene of United States (4: Florida)
• Eocene of Argentina (1), Brazil (1), United States (4: Wyoming)
• Cretaceous of Argentina (18), United States (1: California), Uruguay (5)
Total: 37 collections including 50 occurrences