''Callobius claustrarius'' is a species of spider in the family
Amaurobiidae
''Amaurobiidae'' is a family of three-clawed cribellate or ecribellate spiders found in crevices and hollows or under stones where they build retreats, and are often collected in pitfall traps. Unlidded burrows are sometimes quite obvious in crust ...
. Males of the species reach 8 mm, females about 11 mm. Head and legs are reddish brown, the
abdomen
The abdomen (colloquially called the belly, tummy, midriff, tucky or stomach) is the part of the body between the thorax (chest) and pelvis, in humans and in other vertebrates. The abdomen is the front part of the abdominal segment of the torso. ...
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
The Palearctic or Palaearctic is the largest of the eight biogeographic realms of the Earth. It stretches across all of Eurasia north of the foothills of the Himalayas, and North Africa.
The realm consists of several bioregions: the Euro-Sibe ...
species. In
Europe
Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...
, 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
Bulgaria (; bg, България, Bǎlgariya), officially the Republic of Bulgaria,, ) is a country in Southeast Europe. It is situated on the eastern flank of the Balkans, and is bordered by Romania to the north, Serbia and North Macedon ...
.
[Platnick 2008]
Footnotes
References
* (2008)
The world spider catalog version 8.5. ''American Museum of Natural History''.
{{Taxonbar, from=Q2578448
Amaurobiidae
Endemic fauna of Bulgaria
Spiders of Europe
Spiders described in 1833
Taxa named by Carl Wilhelm Hahn