They are cream-colored to brown or black, usually with at least two longitudinal stripes along the mantle.

The penis is short compared to those of Limax, and in shape it may be "tubular, baggy, or claviform" (club-shaped).

[2] Many species live in mountain habitat, where they can be found on trees and rocks and feed on lichens.

Currently (2022) authorities disagree whether to split off some species into the genus Ambigolimax, as some phylogenies based on DNA sequences suggest is appropriate.

[3] The following list defines Lehmannia in the broad sense (sensu lato), but indicates which species have been placed in Ambigolimax:[4][3] Note that the name Lehmannia nyctelia (= Ambigolimax nyctelius) is no longer valid.