†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

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Ecology: epifaunal carnivore

Distribution:

• Cretaceous of Austria (1 collection), France (6), Mexico (1)

Total: 8 collections each including a single occurrence

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