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 mmFemale
Epigyne small and rounded. Prosoma 1.8-2 mm long. Colouration as in male.
Body length female: 3.5-8.6 mmAdditional 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
Phenology
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
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Figures
Pedipalp, ventral view
(Pesarini unpubl.)
Pedipalp, ventral view
(Roberts 1995)
Pedipalp, ventral view
(Wiehle 1937)
Pedipalp, ventral view
(Yoshida 2001)
Epigyne
(Pesarini unpubl.)
Epigyne
(Roberts 1995)
Epigyne
(Wiehle 1937)
Epigyne
(Yoshida 2001)
Vulva
(Wiehle 1937)
Vulva
(Yoshida 2001)
Habitus
(Wiehle 1937)
Habitus, dorsal view
(Faúndez & Carvajal 2016)
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 
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
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
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
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
Polchaninova N, Prokopenko E (2019) An updated checklist of spiders (Arachnida: Araneae) of Left-Bank Ukraine. Arachnologische Mitteilungen 57: 60-64 & App
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