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Theridiidae  Sundevall, 1833 / Latrodectus  Walckenaer, 1805   10 species

Latrodectus variolus Walckenaer, 1837

WSC LSID urn:lsid:nmbe.ch:spidersp:007828

Key to genera | Key to species

Description
Distribution
  Presence
  Not established
  No data
Global distribution (WSC 2026): Canada, USA
Figures
species

male Pedipalp, ventral view
(Kaston 1970)

species

male Pedipalp, retrolateral view
(Kaston 1970)

species

male Pedipalp, ventral view
(McCrone & Levi 1864)

species

male Pedipalp, ventral view
(McCrone & Levi 1864)

species

male Pedipalp, prolateral view
(McCrone & Levi 1864)

species

male Pedipalp, prolateral view
(McCrone & Levi 1864)

species

male Pedipalp, retrolateral view
(McCrone & Levi 1864)

species

male Pedipalp, retrolateral view
(McCrone & Levi 1864)

species

female Epigyne
(Sherwood 2025)

species

female Vulva, dorsal view
(Sherwood 2025)

species

female Vulva, dorsal view
(Kaston 1970)

species

female Vulva, dorsal view
(McCrone & Levi 1864)

Distribution List

"No references" does not mean that the species does not occur in this country, but that we have not yet inserted the reference for it. We are working on it.

United Kingdom   (Sherwood, 2025) |||
References

Kaston B J (1970) Comparative biology of American black widow spiders. Transactions of the San Diego Society of Natural History 16: 33-82 pdf

McCrone J D, Levi H W (1864) North American widow spiders of the Latrodectus curacaviensis group (Araneae: Theridiidae). Psyche, Cambridge 71: 12-27 pdf

Sherwood D (2025) Annotated checklist of imported non-native spider (Araneae) taxa recorded in the United Kingdom 1800–2024. Arthropoda Selecta 34: 121-160 pdf

WSC (2025) World Spider Catalog. Version 26. Natural History Museum Bern, online at http://wsc.nmbe.ch (28.2.2025) doi: 10.24436/2 pdf

Updates
07-05-2025 Image insert
02-05-2025 Distribution insert Detail
02-05-2025 Image insert