#4924 · 🪼 jellyfish, starfish, worms & co
Snake-headed Flatworm
🇳🇱 Tweelijnige landplatworm ·Rhynchodemus sylvaticus
🪼 Jellyfish, starfish, worms & co 📍 in the Netherlands
📍 Karns, TN 37921, USA
📍 Lord Howe Island NSW 2898, Australia
📍 Coffs Harbour NSW, Australia
📍 Hess Rd, East Liverpool, OH, US
📍 22950 Trégueux, France
📍 3997 't Goy, Netherlands
10 photos from iNaturalist (Creative Commons) · credits & licences
- 1. © Jason M Crockwell · CC BY-NC-ND 4.0
- 2. © Even Dankowicz · CC BY 4.0
- 3. © jfb22 · CC BY-NC 4.0
- 4. © Markus Krieger · CC BY 4.0
- 5. Karns, TN 37921, USA:© Will Kuhn · CC BY 4.0
- 6. Lord Howe Island NSW 2898, Australia:© Nick Lambert · CC BY-NC-SA 4.0
- 7. Coffs Harbour NSW, Australia:© Nick Lambert · CC BY-NC-SA 4.0
- 8. Hess Rd, East Liverpool, OH, US:© Mercedes-Fletcher · CC BY-NC 4.0
- 9. 22950 Trégueux, France:© jfb22 · CC BY-NC 4.0
- 10. 3997 't Goy, Netherlands:© sytskew · CC BY-NC 4.0
what is it?
Rhynchodemus is a genus of land planarians in the tribe Rhynchodemini.
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 10 times in the Netherlands on iNaturalist.
- 1,218 observations worldwide on iNaturalist.
fact sheet
- English
- Snake-headed Flatworm
- Nederlands
- Tweelijnige landplatworm
- scientific name
- Rhynchodemus sylvaticus
- order
- Tricladida
- family
- Geoplanidae
- sightings in NL
- 10
- sightings in Europe
- 209
- sightings worldwide
- 1,218
- GBIF records in NL
- 125
- weight
- —
- length
- —
- lifespan
- —
relatives· Geoplanidae
#4934 📷 10Obama Flatworm
🇳🇱 Grote gevlekte landplatworm
Obama nungara
👀 8 in NL
#4943 📷 10two-tone planarian
🇳🇱 Grote Australische geelstreep
Caenoplana variegata
👀 6 in NL
#4944 📷 10Donkere landplatworm
Microplana terrestris
👀 6 in NL
#4949 📷 10Blue Garden Flatworm
🇳🇱 Blauwe tuinplatworm
Caenoplana coerulea
👀 5 in NL
Sources: iNaturalist taxon 484654, Wikidata Q2557655, GBIF 2502940, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.