†subfamily Nucleopsinae Cossmann 1895 (snail)
Gastropoda - Heterostropha - Acteonidae
Parent taxon: Actaeonidae according to E. C. Allison 1955
Sister taxa: Acteocinidae, Acteon, Acteonellinae, Acteoninae, Bullina, Crenilabium, Cylindrobullinae, Japonactaeon, Lithophysema, Ongleya, Pirsila, Pupa, Rictaxis, Semiactaeon, Solidula, Tenuiactaeon, Tornatellaea, Triploca, Vasjugania, Wangacteon
Subtaxa: Liocarenus
Ecology: epifaunal carnivore
Distribution: