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Clave taxonómica para larvas de las familias del orden Trichoptera (Insecta) de Costa Rica

Biol. Trop. (Int. J. Trop. Biol 10/2006; 54:273-286.

ABSTRACT A taxonomic key to the families of caddisfly larvae (Insecta: Trichoptera) of Costa Rica. The use of aquatic macroinvertebrates as bioindicators for water quality and environmental degradation of aquatic ecosystems has become more and more important in Costa Rica during the past years. For this reason, taxonomic and ecological investigations on the different groups of bioindicators, such as aquatic insects, is gaining more and more importance and can be considered as indispensable in the use of indices for biomonitoring. One of the most abundant and diverse groups of aquatic insects are the caddisflies, with their larvae living in a great variety of the country's varied aquatic habitats. Therefore, in this work a taxonomic key for the identification of the families of Trichoptera larvae of Costa Rica is presented. Additionally, commentaries on the taxonomic diversity and ecology of each family are included, in order to facilitate the use of this important group of bioindicators. Such publications also help fill the general need for taxonomic keys to many groups of insects from tropical countries. Rev. Biol. Trop. 54 (Suppl. 1): 273-286. Epub 2006 Sept. 30. Los tricópteros pertenecen a los órdenes de insectos primeramente acuáticos, lo que quiere decir que la totalidad de sus especies dependen del medio acuático para su desa-rrollo. El orden está relacionado con los lepidópteros y los adultos asemejan pequeñas polillas; sin embargo, sus alas están cubiertas de pelos en lugar de escamas y sus piezas bucales no forman una proboscis, si no más bien se encuentran bastante reducidas. El tamaño de los adultos varía entre 2 y 50 mm, y la mayoría son de colores oscuros (café-negros), aunque las especies de algunos géne-ros poseen colores claros y pueden presentar distintos patrones de manchas. Las larvas viven en diversos ambientes acuáticos y la gran mayoría de las especies habita en ríos y quebradas de aguas limpias y bien oxigenadas. Con ayuda de una seda que producen en una glándula bucal, construyen refugios y estuches o casitas portátiles, los Recibido 10-iii-2006. Corregido 02-vii-2006. Aceptado 30-viii-2006.

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    ABSTRACT: Costa Rica hosts an extraordinarily high biodiversity and is among the best studied neotropical countries. Insects represent the most diverse group of organisms, not only in terrestrial but also in aquatic, especially freshwater, habitats. Among the most diverse aquatic insect orders are the Trichoptera, Diptera and Coleoptera; although Ephemeroptera can locally also be very abundant and diverse. In Costa Rica, the taxonomi-cally best known orders of aquatic insects are the caddisflies (Trichoptera), dragonflies (Odonata) and stoneflies (Plecoptera) and within the Dipterans, groups of medical importance have received special attention. The interest in aquatic insects has been constantly growing in Costa Rica over the past 10 years, but scientific publications are widely dispersed and often difficult to locate. Due to the importance of aquatic organisms in environmental impact studies and biomonitoring of freshwater habitats, there is an urgent need for comprehensive studies and publications that are locally available. In this sense, the present paper tries to give an overview on the state of knowledge and the literature published to date on the aquatic insects of Costa Rica, taking in account taxonomic, biological and ecological studies. Rev. Biol. Trop. 56 (Suppl. 4): 273-295. Epub 2009 June 30.
    Biol. Trop. (Int. J. Trop. Biol. 01/2009; 56:273-295.

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