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Elsewhere, others include the European black widow (Latrodectus tredecimguttatus), the Australian redback spider (Latrodectus hasseltii) and the closely related New Zealand katipō (Latrodectus katipo), several different species in Southern Africa that can be called button spiders, and the South American black-widow spiders (Latrodectus ...
Black widow spiders reproduce sexually when the male inserts his palpal bulbs into the female's spermathecal openings. The female deposits her eggs in a globular silken container in which they remain camouflaged and guarded. A female black widow spider can produce four to nine egg sacs in one summer, each containing about 100–400 eggs.
Latrodectus hesperus, the western black widow spider or western widow, is a venomous spider species found in western regions of North America. The female's body is 14–16 mm (1/2 in) in length and is black, often with an hourglass-shaped red mark on the lower abdomen. This "hourglass" mark can be red, yellow, and on rare occasions, white.
Latrodectus geometricus, commonly known as the brown widow, [2] [3] brown button spider, grey widow, brown black widow, [3] house button spider or geometric button spider, is one of the widow spiders in the genus Latrodectus. As such, it is a 'cousin' to the more infamous Latrodectus mactans (black widow).
Female and male black widow spiders differ in characteristics. Smith and Aggson said female black widows are jet black with a distinct mark that looks like a bright orange or red hourglass on the ...
Despite the estimated 2,200 Black Widow bites annually in the nation, only one known death has occurred since 1983. | Letters to the Editor Black Widow spiders are rarely deadly and have a bad rap ...
The prevalence of sexual cannibalism gives several species of Latrodectus the common name "black widow spider". Sexual cannibalism is when an animal, usually the female, cannibalizes its mate prior to, during, or after copulation. [1] This trait is observed in many arachnid orders, several insect and crustacean clades, [2] gastropods, and some ...
Latrodectus hesperus, the western black widow. “The northern black widow, Latrodectus variolus, lives in the northeastern U.S. and southeastern Canada,” Crawford says. These females lack the ...