Superfamily Arionoidea Gray 1840 (slug)
Parent taxon: Arionoidei according to B. Marshall et al. 2025
Sister taxa: none
Subtaxa: Anadenidae Ariolimacidae Arionidae Binneyidae Philomycidae
Type: Arionidae
Ecology: epifaunal
Distribution: found only at LACM 7679 (Quaternary of California)