Urticating hair
(Redirected from Urtication)
Urticating Hair[edit | edit source]
Urticating hairs are a defense mechanism found in some arthropods, notably certain species of tarantulas and caterpillars. These specialized hairs can cause irritation and discomfort to potential predators or threats.
Description[edit | edit source]
Urticating hairs are barbed bristles that can be released from the body of the animal. In tarantulas, these hairs are typically found on the abdomen and can be flicked into the air using the hind legs. The hairs are designed to irritate the skin or mucous membranes of predators, providing a means of defense.
Types[edit | edit source]
There are several types of urticating hairs, classified based on their structure and function. In tarantulas, these are often categorized into types I through IV, with each type having a different shape and method of causing irritation.
Effects on Humans[edit | edit source]
Contact with urticating hairs can cause a range of symptoms in humans, from mild itching and redness to more severe allergic reactions. The severity of the reaction depends on the type of hair and the sensitivity of the individual.
Examples in Nature[edit | edit source]
Tarantulas[edit | edit source]
Many species of tarantulas, such as the Brachypelma smithi, possess urticating hairs. These spiders use the hairs as a primary defense mechanism against predators.
Caterpillars[edit | edit source]
Certain caterpillars, like those of the Euproctis chrysorrhoea (brown-tail moth), have urticating hairs that can cause skin rashes upon contact.
Related Pages[edit | edit source]
References[edit | edit source]
- Marshall, S. D., & Uetz, G. W. (1990). The function of urticating hairs in the tarantula Grammostola rosea. Journal of Arachnology, 18(2), 143-150.
- Roth, V. D. (1993). Urticating hairs in New World tarantulas. American Arachnology, 47, 1-4.
Grammostola rosea with hair patch
Urtica dioica stinging hair
Eutricha capensis larval anterior
Taturana
Brachypelma smithi urticating hairs
Euproctis Chrysorrhoea skin rash
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