Theridiidae  Sundevall, 1833 / Theridion  Walckenaer, 1805   45 species

Theridion hemerobium  Simon, 1914

Description
Male

Male palp with striking median apophysis. Conductor with terminal hook. Prosoma light yellow, with dark median stripe. Prosoma 1.1-1.8 mm long. Opisthosoma with whitish pattern, bordered with grey. Epigastric area markedly bulging.

Body length male: 2.4-3.88 mm
Female

Epigyne with very small central opening. Prosoma 1.1-2 mm long. Sternum yellowish white, darker on margin. Legs yellow white, with dark annulations. Characters as in male.

Body length female: 3-4.45 mm
Additional information

Usually near water: river banks, pond littorals, sides of lakes, bridges on rivers, marshes, also in pine or oak forests, gardens, among vegetation or stones.

Distribution
  Presence
  No data
Global distribution (WSC 2017): USA, Canada, Europe, Turkey
Phenology
JanFebMarAprMayJunJulAugSepOctNovDec
 male  female
Figures
References

Blagoev G, Deltshev C, Lazarov S (2015) The Spiders (Araneae) of Bulgaria. National Museum of Natural History, Bulgarian Academy of Sciences, online at http://www.nmnhs.com/spiders-bulgaria/ (accessed on 09.03.2015)

Bosmans R, Vanuytven H, Van Keer J (1994) On two poorly known Theridion species, recently collected in Belgium for the first time (Araneae: Theridiidae). Bull Br Arachnol Soc 9: 236-240

Knoflach B, Rollard C, Thaler K (2009) Notes on Mediterranean Theridiidae (Araneae) - II.  In: Stoev P, Dunlop J, Lazarov S (Eds) A life caught in a spider's web. Papers in arachnology in honour of Christo Deltshev. ZooKeys 16: 227-264

Le Peru B (2011) The spiders of Europe, a synthesis of data: Volume 1 Atypidae to Theridiidae. Mém Soc Linn Lyon 2: 1-522

Nolan M (2013) First Irish records of Theridion hemerobius Simon, 1914 (Araneae: Theridiidae) Bulletin of the Irish Biogeographical Society 37: 45-55 pdf

Pantini P, Isaia M (2017) Checklist of the Italian spiders (version May 2017). online at http://www.museoscienzebergamo.it/web/index.php?option=com_content&view=category&layout=blog&id=96&Itemid=94

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

Roberts M J (1995) Spiders of Britain and Northern Europe. Collins Field Guide Bath

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

World Spider Catalog (2017) World Spider Catalog, version 18.0. Natural History Museum Bern, online at http://wsc.nmbe.ch, accessed on 23.01.2017

Updates
04-05-2017 Distribution update Old value
14-10-2015 Image insert
24-04-2015 Distribution update Old value
15-04-2013 Distribution update Old value