{{Short description|Species of spider}} {{Speciesbox | image = Callobius claustrarius.JPG | image_caption = | taxon = Callobius claustrarius | authority = ([[Carl Wilhelm Hahn|Hahn]], 1833) | range_map = | synonyms = <small> ''Clubiona claustrarius''<br /> ''Amaurobius claustrarius''<br /> ''Cybaeus tetricus''<br /> ''Ciniflo claustrarius''<br /> </small> }}

'''''Callobius claustrarius''''' is a species of spider in the family [[Amaurobiidae]]. Males of the species reach 8&nbsp;mm, females about 11&nbsp;mm. Head and legs are reddish brown, the [[abdomen]] is dark grey with an extended brown surface, dotted with lighter brown specks.

Adults can be found from autumn to spring.

This is a [[palearctic]] species. In [[Europe]], it is found in mountainous regions, especially in old, moist forests under rocks. ''C. claustrarius'' is a rather rare species.

The subspecies ''C. claustrarius balcanicus'' (Drensky, 1940) is only found in [[Bulgaria]].<ref>Platnick 2008</ref>

==Footnotes== {{Reflist}}

==References== * {{aut|Platnick, Norman I.}} (2008): [http://research.amnh.org/entomology/spiders/catalog/index.html The world spider catalog], version 8.5. ''American Museum of Natural History''.

{{Taxonbar|from=Q2578448}}

[[Category:Amaurobiidae]] [[Category:Endemic fauna of Bulgaria]] [[Category:Spiders of Europe]] [[Category:Spiders described in 1833]] [[Category:Taxa named by Carl Wilhelm Hahn]]