Linyphiidae  Blackwall, 1859 / Thyreosthenius  Simon, 1884   2 species

Thyreosthenius parasiticus  (Westring, 1851)

Tibia of male palpal with 2 different apophyses. Epigyne ± semicircular. Prosoma yellow-brown to brown, male with shallow, bipartite cephalic lobe. Legs yellowish-brown. Opisthosoma yellow grey to grey. Body length male: 1.5-1.9 mm
Body length female: 1.5-2 mm
Additional information
in places with stable microclimate, without special biotope preference

Frequency: Not rare

Character states from linyphiid key
  No data
Global distribution (WSC 2018): North America, Europe, Caucasus, Russia (European to Far East)
 male  female

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 (accessed on 12.10.2017)

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

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

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

Løvbrekke H (unpubl.)

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

Pantini P, Isaia M (2017) Checklist of the Italian spiders (version May 2017). online at

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

Wiehle H (1960a) Spinnentiere oder Arachnoidea (Araneae). XI. Micryphantidae-Zwergspinnen. Tierwelt Deutschlands 47: 1-620

World Spider Catalog (2018) World Spider Catalog. Natural History Museum Bern, online at, version 19.0, accessed on 14.01.2018. doi: 10.24436/2

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