†subfamily Cylindrobullinae (snail)
Gastropoda - Heterostropha - Acteonidae
Parent taxon: Acteonidae according to N. F. Sohl 1964
Sister taxa: Acteocinidae, Acteon, Acteonellinae, Acteoninae, Bullina, Crenilabium, Japonactaeon, Lithophysema, Nucleopsinae, Ongleya, Pirsila, Pupa, Rictaxis, Semiactaeon, Solidula, Tenuiactaeon, Tornatellaea, Triploca, Vasjugania, Wangacteon
Subtaxa: Nonactaeonina
Ecology: epifaunal carnivore
Distribution:
• Paleocene of Greenland (2 collections)
• Cretaceous of Canada (2: Alberta), United States (40: Alabama, California, Colorado, Delaware, Maryland, Mississippi, South Carolina, South Dakota, Tennessee, Texas, Wyoming)
Total: 44 collections including 51 occurrences