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

Robertus frivaldszkyi  (Chyzer, 1894)

Description
Male

Prosoma 1.7 mm long. Colouration as in female.

Female

Vulva: copulatory ducts coiled as in R. arundineti, but broader and shorter. Palp: claw with 4 teeth. Prosoma dark brownish, darker on edges. Prosoma 2.1 mm long. Sternum brownish, darker on edges. Eyes: AME more than one diameter apart and from ALE, posterior eyes all one diameter apart. Opisthosoma dark greyish, with numerous lighter spots.

Distribution
  Presence
  No data
Global distribution (WSC 2020): Central and south-eastern Europe
Phenology
JanFebMarAprMayJunJulAugSepOctNovDec
 male  female
Figures
Distribution List
Albania   (Deltshev et al., 2011b) ||| Bulgaria   (Blagoev et al., 2018) ||| Greece   (no references) ||| Moldova   (no references) ||| Montenegro   (no references) ||| North Macedonia   (no references) ||| Romania   (no references) ||| Serbia   (no references) ||| Slovakia   (no references) |||
References

Blagoev G, Deltshev C, Lazarov S, Naumova M (2018) The spiders (Araneae) of Bulgaria. Version: August 2018. National Museum of Natural History, Bulgarian Academy of Sciences. Online at http://www.nmnhs.com/spiders-bulgaria/ (accessed on 10.9.2018) pdf

Deltshev C, Vrenozi B, Blagoev G, Lazarov S (2011b) Spiders of Albania – faunistic and zoogeographical review (Arachnida: Araneae). Acta Zoologica Bulgarica 63: 125-144 pdf

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

Helsdingen P J van, IJland S, Komnenov M (2018) Inventory of the spiders (Araneae) of the border region of northern Greece with Albania and FYR Macedonia. Nieuwsbrief SPINED 37: 5-23 pdf

Knoflach B, Thaler K (2000) Notes on Mediterranean Theridiidae (Araneae)-I. Memorie della Società Entomologica Italiana 78: 411-442 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

World Spider Catalog (2020) World Spider Catalog. Version 21.0. Natural History Museum Bern, online at http://wsc.nmbe.ch (20.03.2020) doi: 10.24436/2 pdf

Wunderlich J (1976) Zur Kenntnis der mitteleuropäischen Arten der Gattung Enoplognatha Pavesi und Robertus O. Pick. Cambridge Senckenbergiana Biologica 57: 97-112 pdf

Updates
17-03-2018 Distribution update Detail
18-12-2014 Image insert
04-12-2013 Distribution update Detail