May 9, 2009

A member of Longhorn beetle family / Un miembro de la familia de los Longicornios, el Guitarrero (Compsocerus violaceus)

All longhorn beetles (or more archaically, longicorns) belong to the Cerambycidae family. They are characterized by extremely long antennae, which are often as long as or longer than the beetle's body. The family is large, with over 20,000 species described, slightly more than half from the Eastern Hemisphere. Several are regarded as serious pests, with the larvae boring into wood, where they can cause extensive damage to either living trees or untreated lumber (or, occasionally, to wood in buildings, being a particular problem indoors). A number of species mimic ants, bees, and wasps, though a majority of species are cryptically colored. Despite a vast literature on host relationships of cerambycid larvae and geographic ranges of species, there is scant information on the behavior of adults of many species because they are cryptic and nocturnal. Compsocerus violaceus occurs throughout Uruguay and is popularly known as "Guitarrero" (Guitar player) due to the chirping sound that it produces by rubbing one of its legs against the upper hind edge of the forewing, which has a thick scraper.
Todos los escarabajos de antenas largas (anteriormente denominados longicornios) pertenecen a la familia Cerambycidae. Se los caracteriza por antenas extremadamente desarrolladas, las cuales pueden ser iguales o más grandes que sus cuerpos. Dicha familia es extensa y abarca alrededor de 20,000 especies de las que se han descrito un poco más de la mitad y que pertenecen al hemisferio oriental. Algunas son consideradas pestes, dado que las larvas se albergan en el interior de la madera y pueden crear un daño extenso tanto a árboles como a maderas sin tratamiento (u ocasionalmente a muebles y vigas en edificios). Un número de especies imitan a las hormigas, avejas y avispas, aunque la mayoría utilizan colores miméticos. Pese a la vasta literatura en cuanto a las larvas de Cerambícidos, sus hábitats y zonas de dispersión, existe escasa información respecto al comportamiento adulto de muchas especies dado que suelen ocultarse o son nocturnos. Compsocerus violaceus aparece por todo Uruguay y es popularmente conocido como "Guitarrero"; debido al chirrido que produce al frotar una de sus patas contra el borde del ala delantera superior, la cual contiene una espesa rasqueta.

2 comments:

Andrea said...

Muchas gracias por este post. Felicitaciones por esta comprometida difusión de la biodiversidad del Uruguay. Un abrazo.

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