Linyphiidae  Blackwall, 1859 / Ostearius  Hull, 1911   1 species

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

Description

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
Distribution
  Presence
  No data
Global distribution (WSC 2017): South America. Introduced to Europe, Canary Is. to Egypt and Turkey, South Africa, China, New Zealand
Phenology
JanFebMarAprMayJunJulAugSepOctNovDec
 male  female
mainly early year and autumn
Figures
References

Bayram A, Kunt K B, Danişman T (2017) The checklist of the spiders of Turkey. Version 2017 [last updated 11 January 2017], online at http://www.spidersofturkey.info

Blagoev G, Deltshev C, Lazarov S, Naumova M (2017) The spiders (Araneae) of Bulgaria. Version: October 2017. National Museum of Natural History, Bulgarian Academy of Sciences. Online at http://www.nmnhs.com/spiders-bulgaria/ (accessed on 12.10.2017)

Bosmans R, Van Keer J, Russell-Smith A, Kronestedt T, Alderweireldt M, Bosselaers J, De Koninck H (2013) Spiders of Crete (Araneae). Nieuwsbr Belg Arachnol Ver 28: 1-147

Dandria D, Falzon V, Henwood J (2005) The current knowledge of the spider fauna of the Maltese Islands with the addition of some new records (Arachnida: Araneae). The Central Mediterranean Naturalist 4: 121-129

Helsdingen P J van (2010a) Araneae. In: Fauna Europaea Database (Version 2010.1), online at www.european-arachnology.org

Kostanjšek R, Kuntner M (2015) Araneae Sloveniae: a national spider species checklist. ZooKeys 474: 1-91

Lissner J, Jensen J-K, Hansen L J, Simonsen W, Kelduni R, Nissen K (2016) An updated checklist of spiders (Araneae) of the Faroe Islands. Norwegian Journal of Entomology 63: 197-240

Locket G H, Millidge A F (1953) British Spiders 2. Ray Soc London

Locket G H, Millidge A F, Merrett P (1974) British Spiders 3. Ray Soc London

Løvbrekke H (unpubl.)

Millidge A F (1985) Some Linyphiid spiders from South America (Araneae, Linyphiidae). American Museum Novitates 2836: 1-78

Pantini P, Isaia M (2017) Checklist of the Italian spiders (version May 2017). online at http://www.museoscienzebergamo.it/web/index.php?option=com_content&view=category&layout=blog&id=96&Itemid=94

Pfliegler W A, Schönhofer A, Niedbała W, Vella P, Sciberras A, Vella A (2017) New records of mites (Acari) and harvestmen (Opiliones) from Malta with a preliminary checklist of Maltese Arachnida. Soil Organisms 89: 85-110 pdf

Pfliegler W P (2014) Records of some rare and interesting spider (Araneae) species from anthropogenic habitats in Debrecen, Hungary. e-Acta Naturalia Pannonica 7: 143-156

Roberts M J (1987) The spiders of Great Britain and Ireland. Volume 2: Linyphiidae and checklist. Harley Books Colchester

Roberts M J (1995) Spiders of Britain and Northern Europe. Collins Field Guide Bath

Roberts M J (1998) Spinnengids. Tirion Natuur Baarn, Netherlands

Rozwałka R, Stachowicz J (2010) First record of Ostearius melanopygius (Cambridge, 1879) (Araneae: Linyphiidae) in the eastern part of Poland. Przegl Zool 52-43: 159-161

Thaler K (1978b) Über wenig bekannte Zwergspinnen aus den Alpen, V (Arachnida: Aranei, Erigonidae). Beitr Ent, Berlin 28: 183-200

Wiehle H (1960b) Beiträge zur Kenntnis der deutschen Spinnenfauna. Zool Jb Syst 88: 195-254

World Spider Catalog (2017) World Spider Catalog, version 18.5. Natural History Museum Bern, online at http://wsc.nmbe.ch, accessed on 5.10.2017. doi: 10.24436/2

Updates
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