#4263 · 🕷️ spiders & kin
Black-tailed Ostearius
🇳🇱 Zwartgatje ·Ostearius melanopygius
8 photos from iNaturalist (Creative Commons) · credits & licences
what is it?
Ostearius melanopygius is a species of sheetweb spider in the family Linyphiidae. It is found in South America, and has been introduced into Europe, a range from CanaryIslands to Egypt and Turkey, South Africa, China, and New Zealand.
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 33 times in the Netherlands on iNaturalist.
- 943 observations worldwide on iNaturalist.
fact sheet
- English
- Black-tailed Ostearius
- Nederlands
- Zwartgatje
- scientific name
- Ostearius melanopygius
- class
- Arachnida
- order
- Araneae
- family
- Linyphiidae
- sightings in NL
- 33
- sightings in Europe
- 325
- sightings worldwide
- 943
- GBIF records in NL
- 216
- weight
- —
- length
- —
- lifespan
- —
relatives· Linyphiidae
#4220 📷 10Invisible Spider
🇳🇱 Schorskoloniespin
Drapetisca socialis
👀 87 in NL
#4238 📷 10Old World Dome Sheetweaver
🇳🇱 Lentehangmatspin
Neriene montana
👀 62 in NL
#4252 📷 7Struikhangmatspin
Neriene peltata
👀 39 in NL
#4275 📷 10Garden Hammock Spider
🇳🇱 Tuinhangmatspin
Linyphia hortensis
👀 22 in NL
#4277 📷 10Common sheetweb spider
🇳🇱 Herfsthangmatspin
Linyphia triangularis
👀 19 in NL
#4281 📷 10Kruidhangmatspin
Neriene clathrata
👀 18 in NL
#4327 📷 10Lentestrooiselspin
Microneta viaria
👀 10 in NL
#4342 📷 10Filmy Dome Spider
🇳🇱 Zomerhangmatspin
Neriene radiata
👀 2 in NL
Sources: iNaturalist taxon 226706, Wikidata Q1761555, GBIF 2134305, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.