Theridiidae  Sundevall, 1833 / Theridion  Walckenaer, 1805   63 species

Theridion betteni Wiehle, 1960

Description
Male

Conductor narrow, ± bent rectangularly. Prosoma yellowish-brown, tinged with black, eye region darker. Sternum brown, sometimes almost black. Chelicerae brown, sometimes almost black. Legs yellow-grey, annulated with dark brown. Opisthosoma dorsally with longitudinal band, otherwise very variable, mostly spotted brown, ventrally dark brown with white spots posterior to the epigastric furrow.

Body length male: 2.4-3.0 mm
Female

Epigyne with clearly visible copulatory opening, epigynal groove shallow. 

Body length female: 2.6-3.8 mm
Additional information

In intensely sunny crevices and horizontal mural chinks

Distribution
  Presence
  No data
Global distribution (WSC 2026): Europe, Turkey
Phenology
JanFebMarAprMayJunJulAugSepOctNovDec
 male  female
Figures
Distribution List
Albania   (van Helsdingen et al., 2018) ||| Austria   (Knoflach & Thaler, 1998) ||| Belarus   (Zhukovets, 2017) ||| Bulgaria   (Blagoev et al., 2018) ||| Croatia   (Grbac et al., 2019) ||| Czechia   (Růžička & Řezáč, 2022a) ||| France   (Le Peru, 2007) ||| Germany   (Blick et al., 2016) ||| Greece   (van Helsdingen et al., 2018) ||| Italy   (Isaia et al., 2025) ||| Kosovo   (Geci et al., 2023) ||| Montenegro   (Naumova et al., 2019a) ||| North Macedonia   (Komnenov, 2014) ||| Poland   (Rozwałka & Stanska, 2008) ||| Romania   (Weiss & Petrișor, 1999) ||| Russia, Southern   (Ponomarev, 2022) ||| Slovakia   (Gajdoš et al., 1999) ||| Slovenia   (Kostanjšek & Kuntner, 2015) ||| Spain   (Breitling, 2020) ||| Switzerland   (Maurer & Hänggi, 1990) ||| Turkey (Asia)   (Danışman et al., 2025a) ||| Ukraine   (Kovblyuk et al., 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) pdf

Blick T, Finch O-D, Harms K H, Kiechle J, Kielhorn K-H , Kreuels M, Malten A, Martin D, Muster C, Nährig D, Platen R, Rödel I, Scheidler M, Staudt A, Stumpf H, Tolke D (2016) Rote Liste und Gesamtartenliste der Spinnen (Arachnida: Araneae) Deutschlands. 3. Fassung, Stand April 2008, einzelne Änderungen und Nachträge bis August 2015. Naturschutz und Biologische Vielfalt 70/4: 383-510 pdf

Breitling R (2018) Eric Duffey's spider collection in the Manchester Museum – an update. Newsletter of the British Arachnological Society 141: 5-9 pdf

Breitling R (2020) South European spiders from the Duffey collection in the Manchester Museum (Arachnida: Araneae). Arachnology 18: 333-362 pdf

Danışman T, Kunt K B, Özkütük R S, Coşar İ (2025a) The checklist of the spiders of Turkey. Version 2025 [last updated 01 December 2025], online at http://www.spidersofturkey.info pdf

Gajdoš P, Svatoň J, Sloboda J (1999) Katalóg pavúkov Slovenska. Catalogue of Slovakian spiders. Ústav kr. ekol. SAV, Bratislava, 337 pp.

Geci D, Naumova M, Ibrahimi H, Grapci-Kotori L, Gashi A, Bilalli A, Musliu M (2023) Contribution to spider fauna (Arachnida: Araneae) from Bjeshkët e Nemuna mountains (Kosovo). Natura Croatica 32: 525-547 pdf

Grbac I, Katušić L, Lukić M (2019) Catalogue of spiders (Araneae) deposited in the Croatian Natural History Museum. Natura Croatica 28: 185-269 pdf

Heimer S, Nentwig W (1991) Spinnen Mitteleuropas. Paul Parey Berlin pdf

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

Isaia M, Tolve M, Pantini P (2025) Araneae.it: 2.0: the new updated version of the digital catalog of the Italian spiders and other arachnids (Arachnida: Araneae, Opiliones, Scorpiones, Pseudoscorpiones, Palpigradi, Solifugae). Fragmenta Entomologica 57: 197-204 pdf

Knoflach B, Thaler K (1998) Kugelspinnen und verwandte Familien von Österreich: ökofaunistische Übersicht (Araneae: Theridiidae, Anapidae, Mysmenidae, Nesticidae). Stapfia 667-712 pdf

Komnenov M (2014) Spider fauna of the Osogovo Mt. Range, Northeastern Macedonia. Fauna Balkana 2: 1-267 pdf

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

Kovblyuk M M, Gnelitsa V A, Nadolny A A, Kastrygina Z A, Kukushkin, O V (2016) Spiders (Arachnida: Aranei) of the Karadag Nature Reserve (Crimea). Ekosystemy 3(33): 3-288 pdf

Le Peru B (2007) Catalogue et répartition des araignées de France. Revue Arachnologique 16: 1-468 pdf

Maurer R, Hänggi A (1990) Katalog der schweizerischen Spinnen. Documenta Faunistica Helvetiae 12 pdf

Naumova M, Lazarov S, Deltshev C (2019a) Faunistic diversity of the spiders in Montenegro (Arachnida: Araneae). Ecologica Montenegrina 22: 50-89 pdf

Ponomarev A V (2022) Spiders (Arachnida: Araneae) of the southeast of the Russian Plain: catalogue, the fauna specific features. SSC RAS Publishers, Rostov-on-Don, 640 pp. pdf

Roberts M J (1998) Spinnengids. Tirion, Baarn, Netherlands, 397 pp. pdf

Rozwałka R, Stanska M (2008) Check-list of spiders (Araneae) of Poland. 1. December 2008. online at http://www.arachnologia.edu.pl/en/species/8-spiders-of-poland.html pdf

Růžička V, Řezáč M (2022a) Seznam pavouků České republiky. List of spiders of the Czech Republic. Online at https://www.arachnology.cz/seznam-pavouku-cr-26.html and https://www.arachnology.cz/en/seznam-pavouku-cr-26.html pdf

Thaler K (1966) Fragmenta Faunistica Tirolensia (Diplopoda, Arachnida). Berichte des Naturwissenschaftlich-Medizinischen Vereins in Innsbruck 54: 151-157 pdf

Vanuytven H (2014) Theridion asopi n. sp., a new member of the Theridion melanurum group (Araneae: Theridiidae) in Europe. Arachnology 16: 127-134 pdf

Weiss I, Petrișor A (1999) List of the spiders (Arachnida: Araneae) from Romania. Travaux du Muséum National d’Histoire Naturelle “Grigore Antipa” 41: 79-107 pdf

WSC (2026) World Spider Catalog. Version 27. Natural History Museum Bern, online at http://wsc.nmbe.ch (20.5.2026) doi: 10.24436/2 pdf

Wunderlich J (2011a) Extant and fossil spiders (Araneae). Heutige und fossile Spinnen. Beiträge zur Araneologie 6: 1-640 pdf

Zhukovets E M (2017) [Spiders (Arachnida, Aranei) of the Belovezhskaya Pushcha]. Riftur Print, Minsk, 272 pp. [N.B.: presumably publ. in Jan. 2019] pdf

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