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Amaurobiidae  Thorell, 1869 / Amaurobius  C. L. Koch, 1837   40 species

Amaurobius ruffoi Thaler, 1990

WSC LSID urn:lsid:nmbe.ch:spidersp:022636

Key to genera | Key to species

Description
Male

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
Female

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

Distribution
  Presence
  No data
Global distribution (WSC 2026): Italy
Figures
species

male Pedipalp, ventral view
(Thaler 1990b)

species

male Pedipalp, ventral view
(Pesarini 1991)

species

male Pedipalp, retrolateral view
(Pesarini 1991)

species

male Tibial apophysis
(Thaler 1990b)

species

male Tibial apophysis
(Thaler 1990b)

species

female Epigyne/vulva, ventral view
(Thaler 1990b)

species

female Epigyne/vulva, dorsal view
(Thaler 1990b)

species

female Epigyne, ventral view
(Pesarini 1991)

species

female Vulva, dorsal view
(Pesarini 1991)

Distribution List

"No references" does not mean that the species does not occur in this country, but that we have not yet inserted the reference for it. We are working on it.

Italy   (Isaia et al., 2025) |||
References

Isaia M, Tolve M, Pantini P (2025) Araneae.it: 2.0: the new updated version of the digital catalog of the Italian spiders and other arachnids (Arachnida: Araneae, Opiliones, Scorpiones, Pseudoscorpiones, Palpigradi, Solifugae). Fragmenta Entomologica 57: 197-204 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 (2026) World Spider Catalog. Version 27. Natural History Museum Bern, online at http://wsc.nmbe.ch (13.2.2026) doi: 10.24436/2 pdf