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Thomisidae  Sundevall, 1833 / Xysticus  C. L. Koch, 1835   106 species

Xysticus obscurus  Collett, 1877

Description

Male palp with 2 striking tegular apophyses, the median is hammer-shaped with a massive prolateral branch and blunt tip, the lateral apophysis forms a partially opened tube with bevelled tip. Tibial apophysis bipartite, ventral apophysis large and square-edged, retrolateral apophysis very characteristic in lateral view with broad base and strikingly narrowed apically. Epigyne with circular epigynal groove, posterior side not dark. Vulva laterally with pocket-shaped depressions. Prosoma margined fine dark or black. Female: coloured in different velvety beige and sandy tones. Male: brown to dark brown. Cheeks in female with 3 longitudinal stripes and bright meandered in both sexes. Sternum brown or cream-beige medially and dark brown and yellow-brown on margin. Chelicerae brown proximally, beige and cream patterned distally, female: frontally with especially long spine and further robust spines, male: with long, fine spine. Legs brown to dark brown (female: sandy beige to brown beige), dorsally with fine, brown longitudinal stripes and median, white longitudinal line. Opisthosoma brown with irregular white margin and posteriorly thin, interrupted white to brown-beige transverse bands. Spinnerets brown and margined by fine white line.

Body length male: 5.8-6.8 mm
Body length female: 7.5-8.6 mm
Additional information

On shrubbery and trees, small bushes and low vegetation, only in higher levels, up to 2000 m

Distribution
  Presence
  No data
Global distribution (WSC 2018): North America, Europe, Russia (Europe to Far East)
Figures
References

Biteniekyte M, Relys V (2012) The checklist of Lithuanian spiders (Arachnida: Araneae). Biologija 57: 148-158

Cera I (2018) The checklist of Latvian spiders (Arachnida: Araneae). Environmental and Experimental Biology 16: 139-152 pdf

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

Ivanov V V (2013) The checklist of Belarusian spiders (Arachnida, Araneae). Zoology and Ecology 4: 293-311

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

Løvbrekke H (unpubl.)

Pantini P, Isaia M (2017) Checklist of the Italian spiders (version May 2017). online at http://www.museoscienzebergamo.it/web/index.php?option=com_content&view=category&layout=blog&id=96&Itemid=94 pdf

Thaler K, Knoflach B (1995b) Xysticus obscurus Collett - eine arktoalpine Krabbenspinne neu für Österreich (Arachnida, Araneida: Thomisidae). Ber Nat - Med Ver Innsbruck 82: 145-152

World Spider Catalog (2018) World Spider Catalog, version 19.5. Natural History Museum Bern, online at http://wsc.nmbe.ch (15.07.2018) doi: 10.24436/2

Updates
12-07-2018 Image insert
30-09-2015 Distribution update Old value
28-04-2014 Distribution update Old value