Thomisidae  Sundevall, 1833 / Xysticus  C. L. Koch, 1835   78 species

Xysticus tortuosus  Simon, 1932

Description
Male palp with 2 tegular apophyses, median one hook-shaped, with short shaft and massive, and right-angled branch. Lateral apophysis small and hook-shaped. Tibial apophysis bipartite, ventral apophysis broad at base, bellied, strongly narrowed apically and cut straight or transversely. Retrolateral apophysis broad, cone-shaped in ventral view. Embolus with rectangularly bent tip. Epigyne with short median septum, slightly widened anteriorly. Lateral margin bent semicircularly. Prosoma brown to light brown with many white parts, contrast-rich with striking V-shaped pattern. Broad, cream eye band. Sternum white to cream with yellow margin, heart-shaped to longish oval. Chelicerae distally cream, proximally beige, frontally spined. Legs thick, bright, brown, dorsally slightly darker. Femur prolaterally spotted. Opisthosoma bright brown and grey colouring with fine white margin. White fir-shaped folium (can be reduced) and broad transverse bands posteriorly. Spinnerets grey-brown to light brown. Body length male: 3.5-4.1 mm
Body length female: 5.2-6.9 mm

Frequency: Rarely found

Distribution
  Presence
  No data
Global distribution (WSC 2019): Portugal to Austria, Morocco, Algeria
Figures
References

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

Iorio E (2017) Inventaire des araignées et opilions de la Réserve Naturelle Régionale de la Pointe Saint-Gildas à Préfailles (Loire-Atlantique) (Arachnida). Invertébrés Armoricains 17: 45-61 pdf

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

Pantini P, Isaia M (2018) Checklist of the Italian spiders (version June 2018). online at http://www.museoscienzebergamo.it/web/index.php?option=com_content&view=category&layout=blog&id=96&Itemid=94 pdf

Pesarini C (2000) Contributo alla conoscenza della fauna araneologica italiana (Araneae). Mem Soc Entomol Ital 78: 379-393

World Spider Catalog (2019) World Spider Catalog, version 20.0. Natural History Museum Bern, online at http://wsc.nmbe.ch (20.01.2019) doi: 10.24436/2

Updates
02-01-2018 Image insert