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

Robertus heydemanni  Wiehle, 1965

Description
Male

Prosoma with shiny brown cephalic region, rest of prosoma with black spots and markings, striae distinct, fovea black. Sernum heart-shaped, densely covered with balck spots, Gnathocoxae, Labium and Coxae somewhat lighter. Legs dark brown, femora lighter. Opisthosma black.

Body length male: 2.3 mm
Female

Colouration dirty grey-brown. Sternum with dark margin and suffused with black. Femur and patella somewhat lighter than the rest of leg segments, suffused with black. Opisthosoma grey to black, book lung area brown, shiny.

Body length female: 2.4 mm
Additional information

Usually in damp habitats, marshes, swamps, also in cultivated lands and cereal fields.

Distribution
  Presence
  No data
Global distribution (WSC 2020): Sweden, Germany, Austria, Italy, Romania, Ukraine, Russia (Europe to West Siberia), Kazakhstan
Phenology
JanFebMarAprMayJunJulAugSepOctNovDec
 male  female
Figures
Distribution List
Austria   ( no references ) ||| Denmark   ( no references ) ||| Germany   ( no references ) ||| Greece / Crete   ( no references ) ||| Italy   ( Pantini & Isaia, 2019; ) ||| Romania   ( no references ) ||| Russia, Central   ( no references ) ||| Russia, Western   ( no references ) ||| Sweden   ( no references ) ||| Ukraine   ( Polchaninova & Prokopenko, 2019; ) |||
References

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

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) Araneae.it: the online Catalog of Italian spiders, with addenda on other Arachnid Orders occurring in Italy (Arachnida: Araneae, Opiliones, Palpigradi, Pseudoscorpionida, Scorpiones, Solifugae). http://araneae.it. Fragmenta Entomologica 51: 127-152 pdf

Polchaninova N Y, Prokopenko E V (2013) Catalogue of the spiders (Arachnida, Aranei) of Left-Bank Ukraine. Arthropoda Selecta (Suppl.) 2: 1-268 pdf

Polchaninova N, Prokopenko E (2019) An updated checklist of spiders (Arachnida: Araneae) of Left-Bank Ukraine. Arachnologische Mitteilungen 57: 60-64 & App pdf

Weiss I, Andriescu I (1989) Das Weibchen von Robertus heydemanni Wiehle 1965 (Arachnida: Araneae: Theridiidae). Senck Biol 69: 77-81

Wiehle H (1965a) Beiträge zur Kenntnis der deutschen Spinnenfauna IV. Mitteilungen aus dem Zoologischen Museum in Berlin 41: 11-57 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

Wunderlich J (1973b) Zur Spinnenfauna Deutschlands, XV. Weitere seltene und bisher unbekannte Arten sowie Anmerkungen zur Taxonomie und Synonymie (Arachnida: Araneae). Senckenbergiana Biologica 54: 405-428

Updates
24-04-2015 Distribution update Detail
15-04-2013 Distribution update Detail