Plecoptera (Insecta) imaturos da Amazônia brasileira

Abstract

This study presents for the first time, a classification of immature Plecoptera Brazilian Amazon based on specimens collected during the development of the thesis and other existing collections that were borrowed for the study (INPA, MZUSP, IEPA, MPEG). The classification is based on external morphological characters, both, those already used by other authors as others added in this study. Recent collections were made at the following locations (bacins of Apeú River and Peixe-boi River, Mountain Martírios- Andorinhas, National Forest Caxiuanã, National Forest Amapá, Mountain Tepequém). Collection methods in the field was done by net for aquatic insect with 0.4 cm mesh, steel sieve with 0.7 cm mesh and trawl with 0.3 cm mesh. After harvesting the nymphs were screened in plastic trays and copies in advanced stage of development, were packed in small styrofoam box and then transported to creation. Nymphs were grown to adults to obtain the precise relationship there between. We describe the techniques of creating new methods in plastic cups made in the very stream where they were collected and cement tank in Campus Research Goeldi Museum. Physic-chemical parameters were measured in the water collection sites as temperature, pH, dissolved oxygen and electrical conductivity, and environmental characterization of the type of background, adjacent forests. The material studied contains: nymphs of various instars that were not associated with adults, nymphs and exúviae that were created and associated with adults, adults obtained by collection and by creating nymphs. The immature been described using the terminology Hynes (1941), Harper & Stewart (1984), Froehlich (1984), Couceiro & Hamada (2003) and Olifiers et al. (2005). Were described six nymphs of the species Anacroneiria marlieri, A. minuta, A. manauensis, Macrogynoplax delicata, M. pulchra and Enderleina froehlichi; nymphs of fourteen morphospecies, eleven of Anacroneuria genus: A. sp. n. 1, A. sp. n. 2, A. sp.JMFR1, A. sp.JMFR2, A. sp.JMFR3, A. sp.JMFR4, A. sp.JMFR5, A. sp.JMFR6, A. sp.JMFR7, A. sp.JMFR8, A. sp.JMFR9, A. sp.JMFR10, A. sp.JMFR11, two of Macrogynoplax genus: M. sp.JMFR1, M. sp.JMFR2 and one of Enderleina: E. sp.JMFR1. The morphospecies are certainly new species to be described in due course after the association with adults. It presents, for the first time, a sort key for the species and morphospecies of immature Brazilian Amazon.