Synonym: Siphonariacea Gray 1840 [objective synonym]
Parent taxon: Basommatophora according to P. Bouchet et al. 2005
See also Kosnik 2002 and Todd 2001
Sister taxa: Amphiboloidea, Patellopsis, Pleurolimnaea, Pseudohercynella, Ptychogyra, Vasculum
Subtaxa: Acroreiidae Siphonariidae
Ecology: facultatively mobile epifaunal grazer
Distribution:
• Quaternary of Angola (1 collection), Argentina (3), Australia (2), Bermuda (6), Cuba (1), Ecuador (1), Italy (1), Mozambique (1), Namibia (2), New Zealand (1), South Africa (3), Spain (1), United States (10: California), Uruguay (1)
• Pliocene to Pleistocene of South Africa (1)
• Pliocene of Jamaica (1), South Africa (1), United States (1: California), Venezuela (1)
• Miocene of France (1), Indonesia (1), Italy (2), South Africa (1)
• Oligocene of France (1)
• Eocene of United States (1: Washington)
• Paleocene of Belgium (1), France (1), Poland (1)
• Cretaceous of Canada (3: Alberta, British Columbia), India (1), Japan (2), New Zealand (14), Poland (1), United States (52: Alabama, Arizona, California, Colorado, Delaware, Mississippi, Montana, New Jersey, South Dakota, Tennessee, Texas, Utah, Wyoming)
Total: 122 collections including 131 occurrences