Theridiidae  Sundevall, 1833 / Steatoda  Sundevall, 1833   14 species

Steatoda triangulosa  (Walckenaer, 1802)

Description
Male

Conductor long and bent. Tibia of male palpal longer than cymbium. Prosoma red-brown, wrinkled, 1.6-2 mm long. Sternum red-brown, wrinkled. Chelicerae brown, shiny. Legs yellowish, to bright red-brown, all segments sometimes distally darkened. Opisthosoma dark brown to almost black, pattern yellowish, sometimes broken into single spots.

Body length male: 3.5-5 mm
Female

Epigyne small and rounded. Prosoma 1.8-2 mm long. Colouration as in male.

Body length female: 3.5-8.6 mm
Additional information

Only in buildings in Central Europe, at dry, sunny places under stones in the south, in caves, dunes, forests, garrigue, fallow land, marshes, rocky seashore, littoral salty areas.

Since a few decades, this species shows some spreading tendencies within Europe. Nevertheless, it shall not be listed as alien or invasive because it is native for Europe.

Frequency: Not frequent

Distribution
  Presence
  No data
Global distribution (WSC 2019): Europe, Turkey, Caucasus, Russia (Europe to Far East), Central Asia. Introduced to Canada, USA, Canary Is.
Phenology
JanFebMarAprMayJunJulAugSepOctNovDec
 male  female
Figures
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)

Cera I (2018) The checklist of Latvian spiders (Arachnida: Araneae). Environmental and Experimental Biology 16: 139-152 pdf

Danışman T, Kunt K B, Özkütük R S (2019) The checklist of the spiders of Turkey. Version 2018 [last updated 1 January 2019], online at http://www.spidersofturkey.info

Faúndez E I, Carvajal M A (2016) The spider genus Steatoda Sundevall, 1833 (Araneae: Theridiidae) in the State of North Dakota (USA). Revista Ibérica de Aracnología 29: 83-85

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

Kostanjšek R, Kuntner M (2015) Araneae Sloveniae: a national spider species checklist. ZooKeys 474: 1-91 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

Lissner J, Scharff N (2017) Danish Spiders. Online at http://www.danmarks-edderkopper.dk

Otto S (2017) Caucasian spiders. A faunistic database on the spiders of the Caucasus Ecoregion. Database version 08.2017. Internet: caucasus-spiders.info.

Pantini P, Isaia M (2018) Checklist of the Italian spiders (version June 2018). online at http://www.museoscienzebergamo.it/web/index.php?option=com_content&view=category&layout=blog&id=96&Itemid=94 pdf

Pesarini C (unpubl.)

Pfliegler W A, Schönhofer A, Niedbała W, Vella P, Sciberras A, Vella A (2017) New records of mites (Acari) and harvestmen (Opiliones) from Malta with a preliminary checklist of Maltese Arachnida. Soil Organisms 89: 85-110 pdf

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

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

Rozwalka R, Rutkowski T, Bielak-Bielecki P (2013) New data on introduced and rare synanthropic spider species (Arachnida: Araneae) in Poland. Annales Universitatis Mariae Curie-Sklodowska Lublin - Polonia 68: 127-150

Wiehle H (1937) Spinnentiere oder Arachnoidea, VIII. 26: Familie Theridiidae oder Haubennetzspinnen (Kugelspinnen). Tierwelt Deutschlands 33

World Spider Catalog (2019) World Spider Catalog, version 20.0. Natural History Museum Bern, online at http://wsc.nmbe.ch (20.01.2019) doi: 10.24436/2

Yoshida H (2001) The spider genera Robertus, Enoplognatha, Steatoda and Crustulina (Araneae: Theridiidae) from Japan. Acta Arachnologica 50: 31-48

Updates
24-01-2017 Distribution update Old value
30-12-2016 Image insert
13-05-2014 Distribution update Old value
15-04-2013 Distribution update Old value