Classification
provided by World Register of Marine Species
Originally established as an order containing Ellobiidae, Trimusculidae and all the Stylommatophora. Ranked as superorder by H. Nordsieck (1993: 48. The supposed clade Eupulmonata = [Ellobioidea + Trimusculoidea + Stylommatophora + (maybe) Otinoidea and Systellommatophora ] (used in Southern Synthesis as Order) is here omitted due to current controversy. Barker (2001) and Dayrat & Tillier (2002) support a monophyletic group (Geophila) including the Systellommatophora [= Onchidioidea+Veronicelloidea] and Stylommatophora, whereas H. Nordsieck (1993a) considered the Ellobioidea the sister-group of the Stylommatophora. Conversely, the molecular phylogenetic analysis of Dutra-Clarke et al. (2001) and Grande et al. (2004) has Eupulmonata polyphyletic, with (tentatively!) Ellobioidea as sister-group of all other Euthyneura.
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Environment
provided by World Register of Marine Species
Mostly terrestrial, but some members of the Ellobiida and Systellomatophora are brackish or marine, and some members of the Stylommatophora are freshwater
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