Linyphiidae  Blackwall, 1859 / Ostearius  Hull, 1911   1 species

Ostearius melanopygius  (O. P.-Cambridge, 1879)


Tibial apophysis large, bipartite. Embolus massive. Epigyne with 2 sclerotised clasps. Prosoma brown, with black margin and radial stripes. Sternum yellow-brown, tinged with black, with dark margin. Chelicerae yellow-brown, suffused with black, robust. Male: with tooth-like tubercle. Legs yellow-brown, relatively long. Opisthosoma strikingly orange, red or yellow (unicoloured dark specimens rarely). Broad, black ring around spinnerets.

Body length male: 2.3-2.5 mm
Body length female: 1.9-2.4 mm
Additional information

Frequently in scree, compost and market gardens, not in the mountains, probably expanding from west to east in Europe. This species is not native to Europe (alien species) but it is of South American origin. It had been introduced to Europe at least once and did establish.

Character states from linyphiid key
  No data
Global distribution (WSC 2018): South America. Introduced to Europe, Canary Is. to Egypt and Turkey, South Africa, China, New Zealand
 male  female
mainly early year and autumn

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15-12-2017 Image insert
07-12-2017 Datasheet update Old value
03-02-2017 Image insert
23-09-2015 Distribution update Old value
29-07-2014 Distribution update Old value
15-10-2013 Distribution update Old value