Theridiidae  Sundevall, 1833 / Theridion  Walckenaer, 1805   45 species

Theridion boesenbergi  Strand, 1904

Description

Conductor distally with 2 long tips. Epigyne with posteriorly distinctly bulged groove. Vulva with long and complicated convoluted entrance ducts. Prosoma blackish, with darker margins. Sternum blackish. Chelicerae yellowish. Legs yellowish, annulated with black. Opisthosoma blackish, laterally with white spots, dorsally with brighter dark margined median band, ventrally with large white spot.

Body length male: 2 mm
Body length female: 2-2.5 mm
Additional information

Under stones and on lower twigs of conifers, in the mountains up to 1800 m

Frequency: Rarely found

Distribution
  Presence
  No data
Global distribution (WSC 2018): Europe, Caucasus
Phenology
JanFebMarAprMayJunJulAugSepOctNovDec
 male  female
Figures
References

Blagoev G, Deltshev C, Lazarov S, Naumova M (2018) The spiders (Araneae) of Bulgaria. Version: August 2018. National Museum of Natural History, Bulgarian Academy of Sciences. Online at http://www.nmnhs.com/spiders-bulgaria/ (accessed on 10.9.2018)

Dolejš P, Rückl K (2017) Two rare spider species (Araneae: Araneidae, Theridiidae) found in the Šumava Mts. Journal of the National Museum (Prague), Natural History Series 186: 85-92 pdf

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 pdf

Otto S (2017) Caucasian spiders. A faunistic database on the spiders of the Caucasus Ecoregion. Database version 08.2017. Internet: caucasus-spiders.info.

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 pdf

Thaler K (1966) Fragmenta Faunistica Tirolensia (Diplopoda, Arachnida). Ber Nat - Med Ver Innsbruck 54: 151-157

Wiehle H (1937) Spinnentiere oder Arachnoidea, VIII. 26: Familie Theridiidae oder Haubennetzspinnen (Kugelspinnen). Tierwelt Deutschlands 33

Wiśniewski K, Wesołowska W (2017) Rare spider species (Araneae) from the Giant Mountains and the Izera Mountains – new records for the fauna of Poland. Fragmenta Faunistica 59(2): 115-120 pdf

World Spider Catalog (2018) World Spider Catalog, version 19.5. Natural History Museum Bern, online at http://wsc.nmbe.ch (15.07.2018) doi: 10.24436/2

Updates
08-01-2018 Image insert
31-03-2017 Image insert
31-03-2017 Distribution update Old value
15-04-2013 Distribution update Old value