Amaurobiidae  Thorell, 1870 / Amaurobius  C. L. Koch, 1837   35 species

Amaurobius ruffoi  Thaler, 1990


Prosoma yellowish brown, with faint striae. Prosoma length: 2.8 mm. Opisthosoma: light grey-yellow, dorsally with square, black spot in anterior part, which continues in a dark longitudinal stripe posteriorly. Chelicerae red-brown to dark brown. Sternum yellow-brown. Legs yellowish, with fain annulations on tibiae and ventral side of femora. Tibial apophysis with broad lateral process, median process short and broad.

Body length male: 5.4-7.0 mm

Prosoma length: 3.2 mm. Colouration as in males. Epigyne with lateral parts, reaching beyond median part posteriorly.

Body length female: 6.0-8.6 mm
Additional information

in litter layer of mixed beech forests, only in Vincentine Alps, 800-1700 m

  No data
Global distribution (WSC 2018): Italy

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

Pantini P, Isaia M (2017) Checklist of the Italian spiders (version May 2017). online at

Pesarini C (1991) The Amaurobiidae of Northern Italy (Araneae). Atti Soc Ital Sc Nat Mus Civ Stor Nat Milano 131: 261-276

Thaler K (1990a) Amaurobius ruffoi n.sp., eine weitere Reliktart der Südalpen ? mit Bemerkungen über die Amaurobiidae der Alpen (Arachnida: Aranei). Zool Anz 225: 241-252

World Spider Catalog (2018) World Spider Catalog. Natural History Museum Bern, online at, version 19.0, accessed on 14.01.2018. doi: 10.24436/2