#4694 · 🐌 snails, slugs & other molluscs
Worm Slug
🇳🇱 Grijze wormnaaktslak ·Boettgerilla pallens
🐌 Snails, slugs & other molluscs 📍 in the Netherlands
📍 Ravenna Park, Seattle, WA, US
📍 Taylor Ave N & 5th Ave N, Seattle, WA 98109, USA
📍 View Royal, BC, Canada
📍 Rockcliffe - Manor Park, Ottawa, ON, Canada
10 photos from iNaturalist (Creative Commons) · credits & licences
- 1. © John · CC BY-NC 4.0
- 2. © Caleb · CC BY-NC-ND 4.0
- 3. © Caleb · CC BY-NC-ND 4.0
- 4. © Ian Cooper · CC BY-NC 4.0
- 5. © Caleb · CC BY-NC-ND 4.0
- 6. © Jozef Grego · CC BY-SA 4.0
- 7. Ravenna Park, Seattle, WA, US:© Melissa Frey · CC BY-NC 4.0
- 8. Taylor Ave N & 5th Ave N, Seattle, WA 98109, USA:© Toby · CC BY 4.0
- 9. View Royal, BC, Canada:© Ian Cooper · CC BY-NC 4.0
- 10. Rockcliffe - Manor Park, Ottawa, ON, Canada:© Ethan A. · CC BY-NC 4.0
what is it?
Boettgerilla pallens , common name the worm slug , is a European species of air-breathing land slug, a terrestrial pulmonate gastropod mollusk in the family Boettgerillidae.
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 15 times in the Netherlands on iNaturalist.
- 661 observations worldwide on iNaturalist.
- Scientifically named by Heinrich Simroth in 1912 (114 years ago).
fact sheet
- English
- Worm Slug
- Nederlands
- Grijze wormnaaktslak
- scientific name
- Boettgerilla pallens
- class
- Gastropoda
- order
- Stylommatophora
- family
- Boettgerillidae
- sightings in NL
- 15
- sightings in Europe
- 381
- sightings worldwide
- 661
- GBIF records in NL
- 505
- weight
- —
- length
- —
- lifespan
- —
- named
- 1912 by Heinrich Simroth
Sources: iNaturalist taxon 172114, Wikidata Q3202902, GBIF 4567717, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.