Thomisidae  Sundevall, 1833 / Xysticus  C. L. Koch, 1835   82 species

Xysticus desidiosus  Simon, 1875


Male palp with characteristic, pad-shaped tutaculum (apophysis supporting tip of embolus). 2 bulbal apophyses, one ventral, hook-shaped, apophysis bent at 90°, that is slightly transverse and a lateral one, that is chisel-like, straight. Cymbium and bulbus roundish. Tibial apophysis situated ventrally and basally bullous, cut at an angle distally, further retrolateral apophysis broad at base and tapering toward tip. Embolus rather massive. Epigyne characteristically margined dark and strongly sclerotised, with median septum. Epigynal pits variable in shape, often closed with dark, hard glandular secretion. Vulva has 2 sac-like structures separated from each other, without visible ducts. Prosoma dark brown to light brown. Female: brown, red-brown, sand-coloured to olive brown. With white to cream-coloured, V-shaped sign, with bright, cream-coloured eye field. Sternum light brown, or beige, partly also cream marbled, margin dark brown, longish oval, scarcely spined. Chelicerae proximally brown, afterwards broadly cream-coloured and distally beige, with a long, thin spine. Female: with a long and a shorter spine, rarely with additional bristles. Legs light to dark brown, hardly any white parts, except the dorsal longitudinal stripes. Opisthosoma partly contrast-rich, white and brown, with white margin and vaguely marked off brown to beige oval or leaf-shaped pattern. 5 visible sigilla. Spinnerets light brown to brown.

Body length male: 3.3-4.3 mm
Body length female: 4.6-7.8 mm
Additional information

Under stones in alpine meadows and shrubby heathland, locations between 960-2300 m

  No data
Distribution comment: Italy/Sicily: alpine species, presumably misidentified (cf. Dentici 2019)
Global distribution (WSC 2021): Europe
Distribution List
Austria   (no references) ||| Bulgaria   (Blagoev et al., 2018) ||| France   (no references) ||| France / Corsica   (no references) ||| Germany   (no references) ||| Italy   (Pantini & Isaia, 2019) ||| Liechtenstein   (no references) ||| Montenegro   (no references) ||| Portugal   (Branco et al., 2019) ||| Romania   (no references) ||| Serbia   (no references) ||| Slovenia   (Kostanjšek & Kuntner, 2015) ||| Switzerland   (no references) ||| Ukraine   (no 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 (accessed on 10.9.2018) pdf

Branco V V, Morano E, Cardoso P (2019) An update to the Iberian spider checklist (Araneae). Zootaxa 4614: 201-254 pdf

Dentici A (2019) Third contribution to the knowledge of Sicilian spider fauna (Arachnida Araneae). Biodiversity Journal 10: 117-120 pdf

Jantscher E (2001a) Revision der Krabbenspinnengattung Xysticus C.L. Koch, 1835 (Araneae, Thomisidae) in Zentraleuropa. Dissertation: 1-328 pdf

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

Pantini P, Isaia M (2019) the online catalog of Italian spiders, with addenda on other arachnid orders occurring in Italy (Arachnida: Araneae, Opiliones, Palpigradi, Pseudoscorpionida, Scorpiones, Solifugae). Fragmenta Entomologica 51: 127-152 pdf

WSC (2021) World Spider Catalog. Version 22.0. Natural History Museum Bern, online at (29.05.2021) doi: 10.24436/2 pdf

21-06-2019 Datasheet update Detail
07-03-2016 Image insert