Phenotypic variability of the amazonian species Rhodnius brethesi (Hemiptera: Reduviidae)

COUTINHO DE SOUZA, AMANDA; JUNQUEIRA, ANGELA; CATALÁ SILVIA; CARBAJAL DE FUENTE A.L

JOURNAL OF MEDICAL ENTOMOLOGY

ENTOMOLOGICAL SOC AMER

Lugar: Lanham; Año: 2017 vol. 54 p. 909 - 916

0022-2585

The wild species Rhodnius brethesi is found in areas of piassabais in Microregion Rio Negro, Amazonas, Brazil. Its geographical distribution overlaps the areas of Leopoldinia piassaba palm. In areas where palm trees are distributed, Trypanosoma cruzi transmission cycle is related to the extractive activity of the palm fiber, exposing workers to wild vector transmission of this parasite. The close association with in the palm L. piassaba suggests that this wild triatomine has special features in its sensory system allowing specificity of ecotope. The objective of the study is to identify the antennal sensilla phenotype and morphologically characterize the size and shape of the wings of wild R. brethesi, and to compare with the phenotype present in individuals reared in the laboratory. From the antennal phenotype and geometric morphometry of wings it was possible to separate populations by sex and ecotope. Higher density and length of the chemoreceptor TH suggests a ecotope specificity. The techniques used to verify the morphological patterns are important resources for observations of populations of triatomine artificial environment and wild.