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 2021): Bulgaria
Figures
Distribution List
Bulgaria   (Blagoev et al., 2018) |||
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) pdf

Drensky P (1940) Die Spinnenfauna Bulgariens IV. Mitteilungen aus den Königlichen Naturwissenschaftlichen Instituten in Sofia 13: 169-194 pdf

WSC (2021) World Spider Catalog. Version 21.5. Natural History Museum Bern, online at http://wsc.nmbe.ch (03.01.2021) doi: 10.24436/2 pdf

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