Theridiidae  Sundevall, 1833 / Robertus  O. Pickard-Cambridge, 1879   19 species

Robertus alpinus  Dresco, 1959




Vulva: coiled ducts with 4 turns. Prosoma 1.6 mm long. Prosoma pigmented, eyes ringed with black. Eyes: AME slightly more than one diameter apart from ALE, PME one diameter apart, 1.5 diameters from PLE, AME one diameter from PME. Chelicerae with one tooth on posterior margin and 3 teeth on anterior margin. Leg colouration as prosoma.

Additional information

Only one female known. In mountain, at the base of a glacier. Altitude 2200 m.

  No data
Global distribution (WSC 2021): Italy
Distribution List
Italy   (Pantini & Isaia, 2019) |||

Dresco E (1959a) Sur quelques espèces du genre Robertus (Araneae, Theridiidae). Description de R. alpinus et R. cardesensis spp. nov. Bulletin du Muséum National d'Histoire Naturelle de Paris 31: 242-247 pdf

Le Peru B (2011) The spiders of Europe, a synthesis of data: Volume 1 Atypidae to Theridiidae. Mémoires de la Société Linnéenne de Lyon 2: 1-522 pdf

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

WSC (2021) World Spider Catalog. Version 22.0. Natural History Museum Bern, online at (29.05.2021) doi: 10.24436/2 pdf

24-06-2014 Image insert