Resources:
Amaurobiidae  Thorell, 1870 / Callobius  Chamberlin, 1947   2 species

Callobius balcanicus  (Drensky, 1940)

Description
Male

The male of Callobius balcanicus resembles C. claustrarius in having the similar conductor, distal embolus, and massive tegular apophysis but can be distinguished by the bigger palp, bigger and different kind of tegular apophysis (much more hook formed by C. claustrarius) and longer and slightly twisted  prolateral tibial apophysis in C. balcanicus.

prosoma length: 3.9 mm, prosoma width: 2.9 mm.

Body length male: 8-9 mm
Female

The female can be easily recognized by the longer epigynal and tapering lateral lobes in C. balcanicus. Vulva with big elliptical receptacles.

prosoma length: 4.5 mm, prosoma width: 3.0 mm.

Body length female: 10-12 mm
Distribution
  Presence
  No data
Global distribution (WSC 2018): Bulgaria
Figures
References

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)

Drensky P (1940) Die Spinnenfauna Bulgariens IV. Mitt Nat Instit Sofia 13: 169-194

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

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

Updates
09-05-2016 Datasheet update Old value
26-03-2015 Image insert