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The redback spider (Latrodectus hasselti), also known as the Australian black widow, [2] [3] [4] is a species of highly venomous spider believed to originate in Australia but now, Southeast Asia and New Zealand, it has also been found in packing crates in the United States with colonies elsewhere outside Australia. [5]
Latrodectus hasselti, the redback spider. The widow spiders (genus Latrodectus), such as the black widow, redback spider, and katipō are spiders that carry a neurotoxic venom [18] which can cause a set of symptoms known as Latrodectism. Widow spiders are large, shiny house spiders with relatively spindly legs and deep, globular abdomens.
Here are spider bite pictures and tips to identify them. Two venomous spiders, black widows and brown recluse spiders, can cause severe symptoms, experts say. ... Treatment at the hospital for a ...
People who have been bitten by a black widow spider are recommended to seek professional medical assistance for symptoms. [15] Symptoms self-resolve in hours to days in a majority of bites without medical intervention. Medical treatments have varied over the years. Some treatments (e.g. calcium gluconate) have been discovered to be useless. [16]
“The hobo spider can inflict a painful bite that results in localized red swelling and some pain, but no necrotic lesion,” Potzler says. Usually, symptoms will get better within 24 hours with ...
The katipō's closest relative is the Australian redback spider (Latrodectus hasseltii). [ 4 ] [ 5 ] Latrodectus katipo and L. atritus (black katipō) were previously thought to be two separate species, [ 6 ] [ 7 ] but research has shown that they are a single species, L. katipo , with colour variation that is clinal over latitude and ...
The eye arrangement of spiders in the genus Latrodectus. Female widow spiders are typically dark brown or a shiny black in colour when they are full grown, usually exhibiting a red or orange hourglass on the ventral surface (underside) of the abdomen; some may have a pair of red spots or have no marking at all.
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