Letourneuxia is a genus of large air-breathing land slugs, terrestrial pulmonate gastropod mollusks in the family Arionidae, the roundback slugs.

This genus is monotypic, containing the single species Letourneuxia numidica Bourguignat, 1866 is now considered a junior synonym of L.

[2][3] Letourneuxia moreleti (P. Hesse 1884) is considered either as another synonym of L. nyctelia[4] or as a species in the genus Geomalacus.

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