Lehmannia valentiana




Lehmannia valentiana (Ferussac, 1821)

Common Name

Three-band gardenslug, Greenhouse slug


Mature adults of this slug can attain a length of about 50-75 mm. The three-band gardenslug appears translucent and has a yellow-grey or yellow-violet color. The slug generally has a two pairs of dark bands on either side of the body’s midline. The lower pair of bands may be faint in some individuals. The sole of the slug is pale grey in color. The keel of this slug is short and does not extend out to the mantle. The mantle has multiple ridges with what appears to be a fingerprint-like pattern. The pneumostome (breathing pore) is located on the right, in the posterior third of the mantle. The non-sticky, colorless mucus produced by this slug is very watery.

The following species can be separated by dissection and observation of their genitalia:

Lehmannia marginata: The appendix on the penis of this species tapers to a point.

L. valentiana: The appendix on the penis of this species is somewhat tubular or the apex may appear expanded.

Native Range

Iberian Peninsula


North America

South America


Asia: Japan




The three-band gardenslug is nocturnal in nature and is often dispersed by human activity. This species inhabits moist habitats and generally comsumes decaying wood and living plant material and is often considered a serious pest in greenhouses. This slug produces copious amounts of slime as a defense mechanism. The oval eggs produced by this species are yellow and measures 2.25 mm wide. There may be as many as 60 eggs per clutch.


  • Limax valentianus Ferussac, 1821
  • Limax valentiana Ferussac, 1822
  • L. poirieri Mabille, 1883
  • L. marginatus of authors, not Muller, 1774.


Anderson 2005; Horsak et al. 2004; Kerney et al. 1979; Roth and Sadeghian 2006; Udaka and Numata 2008

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