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#4622 · 🐌 snails, slugs & other molluscs

Tree slug

🇳🇱 Bosaardslak ·Lehmannia marginata

DDdata deficient 🐌 Snails, slugs & other molluscs 📍 in the Netherlands
Tree slug, photo 1 of 9
1/9 © Dieter Schulten · CC BY 4.0

what is it?

Lehmannia marginata is species of air-breathing land slug, a terrestrial pulmonate gastropod mollusk in the family Limacidae. Sometimes classified in the genus Limax , the species is distinct in its ecology, and its nearly transparent body. It is a medium-sized species, rarely exceeding 12 cm in body length. The body is fairly long and narrow, with a marked keel. The keel looks lighter than the remaining body against the darker innards.

base stats

  • NL sightings 72iNaturalist, research grade
  • worldwide 5,236iNaturalist observations

Bars compare against all animals on log scales: up to 300,000 Dutch and 600,000 worldwide sightings (the most-seen species), 150 t (blue whale), 30 m and 400 years (Greenland shark).

fun facts

  • Spotted 72 times in the Netherlands on iNaturalist.
  • 5,236 observations worldwide on iNaturalist.
  • Scientifically named by Otto Friedrich Müller in 1774 (252 years ago).

fact sheet

English
Tree slug
Nederlands
Bosaardslak
scientific name
Lehmannia marginata
class
Gastropoda
order
Stylommatophora
family
Limacidae
IUCN Red List
DD · data deficient
sightings in NL
72
sightings in Europe
2,373
sightings worldwide
5,236
GBIF records in NL
3,348
weight
—
length
—
lifespan
—
named
1774 by Otto Friedrich Müller

IUCN in Dutch: onvoldoende gegevens. Blank means the sources don't say.

relatives· Limacidae

Sources: iNaturalist taxon 172036, Wikidata Q489629, GBIF 5781247, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.

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