#4622 · 🐌 snails, slugs & other molluscs
Tree slug
🇳🇱 Bosaardslak ·Lehmannia marginata
9 photos from iNaturalist (Creative Commons) · credits & licences
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
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
#4572 📷 7Leopard Slug
🇳🇱 Tijgerslak
Limax maximus
LC 👀 751 in NL
#4620 📷 7Ash-black Slug
🇳🇱 Zwarte aardslak
Limax cinereoniger
LC 👀 74 in NL
#4649 📷 9Yellow Cellar Slug
🇳🇱 Lichte aardslak
Limacus flavus
LC 👀 33 in NL
#4682 📷 10Striped Greenhouse Slug
🇳🇱 Spaanse aardslak
Ambigolimax valentianus
LC 👀 18 in NL
#4769 📷 10Green Cellar Slug
🇳🇱 Groene aardslak
Limacus maculatus
🌍 4.7k seen
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.