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MORPHOBIOLOGICAL ASPECTS OF RHODNIUS BRETHESI MATTA, 1919 (HEMIPTERA:REDUVIIDAE) FROM THE UPPER AND MIDDLE NEGRO RIVER, AMAZON REGION OF BRAZIL. I - SCANNING ELECTRON MICROSCOPY
Morfologia externa
Taxonomia
Microscopia Eletrônica de Varredura
Região Amazônica
Brasil
External morphology
Taxonomy
Scanning electron microscopy
Amazon region
Brazil
Author
Affilliation
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Entomologia. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Medicina Tropical. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Medicina Tropical. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Medicina Tropical. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Entomologia. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Medicina Tropical. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Medicina Tropical. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Medicina Tropical. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Entomologia. Rio de Janeiro, RJ. Brasil.
Abstract
The occurrence of autochthonous cases of Chagas disease in the Amazon region of Brazil over recent decades has motivated an intensification of studies in this area. Different species of triatomines have been identified, and ten of these have be proven to be carriers of the parasite Trypanosoma cruzi or “cruzi-like” parasites. Studies conducted in the municipalities of Santa Isabel do Rio Negro and Barcelos, located on the Upper and Middle of the Negro River, microregion of Negro River, state of Amazonas have confirmed not only that Rhodnius brethesi is present in the palm tree Leopoldinia piassaba, but also that this insect was recognized by palm fiber collectors. A morphological study of eyes, inter-ocular and inter-ocellar regions, antennae, buccula, labrum, rostrum, stridulatory sulcus and
feet, including the apex of the tibia, spongy fossette and ctenidium was conducted by scanning electron microscopy. The buccula and the stridulatory sulcus presented notable differences in specimens of different genera and also of different species. These data make it possible to suggest that the details presented in these structures can be included as diagnostic characteristics to be used in new dichotomous keys, thereby contributing towards studies of taxonomy and systematics and furnishing backing for comparative analysis of specimens collected from different
localities.
Keywords in Portuguese
Rhodnius brethesiMorfologia externa
Taxonomia
Microscopia Eletrônica de Varredura
Região Amazônica
Brasil
Keywords
Rhodnius brethesiExternal morphology
Taxonomy
Scanning electron microscopy
Amazon region
Brazil
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