Subfamily Lioplacinae Gill 1863 (snail)
Gastropoda - Architaenioglossa - Viviparidae
Synonym: Campelomatinae Thiele 1929
Parent taxon: Viviparidae according to P. Bouchet et al. 2005
Sister taxa: Bellamyinae, Kosoviinae, Lioplacodes, Paludininae, Tulotomoides, Viviparinae
Type: Lioplax
Ecology: epifaunal omnivore
Distribution:
• Quaternary of United States (2: Florida, Michigan collections)
• Paleocene of Canada (9: Alberta, Saskatchewan)
• Cretaceous of China (2), Svalbard and Jan Mayen (1), United States (8: Montana, North Dakota, South Dakota, Utah, Wyoming)
Total: 22 collections including 23 occurrences