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The genus Latrodectus was erected by Charles Athanase Walckenaer in 1805, for the species Latrodectus tredecimguttatus and Latrodectus mactans. [1] [25] Arachnologist Herbert Walter Levi revised the genus in 1959, studying the female sexual organs and noting their similarity across described species.
May 21, 2024 · A red widow spider (Latrodectus bishopi) is found in sandy areas of Florida. In addition to L. mactans, three other black widow species are found in the United States: L. hesperus, L. variolus, and L. geometricus. The latter is also called the brown widow and is native to Africa.
- The Editors of Encyclopaedia Britannica
A large female black widow spider can grow to about 1.5 inches (38 millimetres), including leg span. Their body measures about 0.5 – 0.6 inches (12 – 16 millimetres). Male black widow spiders are half the size of the female or even smaller. They have longer legs and a smaller abdomen in relation to their body size.
The redback spider (Latrodectus hasselti), also known as the Australian black widow, is a species of highly venomous spider believed to originate in South Australia or adjacent Western Australian deserts, but now found throughout Australia, Southeast Asia and New Zealand, with colonies elsewhere outside Australia.
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Photo Ark. Black Widow Spiders. Common Name: Black Widow Spiders. Scientific Name: Latrodectus. Type: Invertebrates. Diet: Carnivore. Average Life Span In The Wild: 1 to 3 years. Size: 1.5...
Latrodectus bishopi was raised to a full species in 1964 by John D. McCrone and Herbert W. Levi. It can be distinguished from L. mactans by features of the male and female genitalia: the embolus of the male palpal bulb has one fewer loop as do the connecting ducts leading to the female spermatheca .
Aug 30, 2018 · The stereotypical black widow is a shiny, round, black spider with a red hourglass mark on its ventral side (belly). Mature female black widows present this appearance. They typically also have a red or orange patch above their spinnerets. Male black widows are much smaller than females, with elongated purple, gray, or black bodies, white ...
