Amaurobiidae  Thorell, 1870 / Amaurobius  C. L. Koch, 1837   38 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 2021): Italy
Distribution List
Italy   (Pantini & Isaia, 2019) |||

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

Pesarini C (1991) The Amaurobiidae of Northern Italy (Araneae). Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale di Milano 131: 261-276 pdf

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

WSC (2021) World Spider Catalog. Version 22.5. Natural History Museum Bern, online at (22.09.2021) doi: 10.24436/2 pdf