A colony was formed from eggs of a Rhodnius sp. female collected in Taquarussu, Mato Grosso do Sul, Brazil, and its specimens were used to describe R.
taquarussuensis
sp. n. This species is similar to R.
neglectus, but distinct characters were observed on the head, thorax, abdomen, female external genitalia and male genitalia. Chromosomal differences between the two species were also established.
Panstrongylus megistus é considerado um dos principais vetores da doença de Chagas, devido à sua alta susceptibilidade ao Trypanosoma cruzi, ampla distribuição geográfica e adaptação a vários habitats e hospedeiros. Por essa razão, pode ser encontrado no domicílio e peridomicílio no estado da Bahia, no ambiente silvestre ou domiciliado na região Sudeste, predominantemente silvestre no Sul do País (Barbosa et al 2,3 1999, 2001 Embora na literatura consultada sejam encontradas publicações mostrando diferenças morfométricas
Comunicações BrevesBrief communications
In the family Cimicidae, the genus Cimex stands out for its importance in public health. These hemipterans are known as “bed bugs” and their presence generally indicates poor hygiene and poverty. Cimex lectularius is a hematophagous insect and has a global distribution. In Brazil, control occurs indirectly, due to the control of other vectors. The real knowledge of the epidemiological situation is still compromised by under-reporting. To contribute to the knowledge of the biology and taxonomy of these hematophagous insects, the morphological characters of adults and the five nymphal instars of C. lectularius were analyzed and characterized by means of scanning electron microscopy (SEM). Morphological study by SEM allowed the characterization of eggshell, each nymphal instar, the sexual differentiation of fifth instar nymphs, female, and male external genitalia. In this study it was possible to evaluate the morphological characters of C. lectularius, of all five nymphs’ instars. It is relevant to characterize the morphology of these insects, since the results obtained can contribute to the control actions, as well as to the taxonomic studies of this species.
In the family Cimicidae, the genus Cimex stands out for its importance in public health. These hemipterans are known as “bed bugs” and their presence generally indicates poor hygiene and poverty. Cimex lectularius is a hematophagous insect and has a global distribution. In Brazil, control occurs indirectly, due to the control of other vectors. The real knowledge of the epidemiological situation is still compromised by under-reporting. To contribute to the knowledge of the biology and taxonomy of these hematophagous insects, the morphological characters of adults and the five nymphal instars of C. lectularius were analyzed and characterized by means of scanning electron microscopy (SEM). Morphological study by SEM allowed the characterization of eggshell, each nymphal instar, the sexual differentiation of fifth instar nymphs, female, and male external genitalia. In this study it was possible to evaluate the morphological characters of C. lectularius, of all five nymphs’ instars. It is relevant to characterize the morphology of these insects, since the results obtained can contribute to the control actions, as well as to the taxonomic studies of this species.
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