Triatoma infestans check for this species in other resources - Triatoma brasiliensis check for this species in other resources - Triatoma sordida check for this species in other resources - Triatoma pseudomaculata check for this species in other resources - Rhodnius neglectus check for this species in other resources - Rhodnius nasutus check for this species in other resources "/>
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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 97, No. 8, 2002, pp. 1121-1125
Bioline Code: oc02245
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 97, No. 8, 2002, pp. 1121-1125

 en Relationship between Antennal Sensilla Pattern and Habitat in Six Species of Triatominae
AL Carbajal de la Fuente & S Catalá

Abstract

In order to determine if habitat similarity is correlated with a similarity of sensilla pattern, we analyzed six species of Triatominae present in two biogeographic regions of Brazil: the "caatinga" and the "cerrado". In broad terms Triatoma infestans check for this species in other resources (cerrado) and T. brasiliensis check for this species in other resources (caatinga) are found in human domiciles, T. sordida check for this species in other resources (cerrado) and T. pseudomaculata check for this species in other resources (caatinga) colonize peridomestic habitats, and Rhodnius neglectus check for this species in other resources (cerrado) and R. nasutus check for this species in other resources (caatinga) inhabit palm tree crowns. The number and distribution of four sensilla types (bristles, thin and thick walled trichoidea, and basiconica) were compared in these species. Sexual dimorphism of sensilla patterns was noted in T. sordida, T. brasiliensis and T. pseudomaculata. A principal component analysis showed three main groups: (i) species that live in the palms, (ii) domiciliated species and (iii) those living in the peridomestic habitat. T. infestans almost exclusively domestic, was placed at the centre of the canonical map and some individuals of other species overlapped there. These results support the idea that the patterns of antennal sensilla are sensitive indicators of adaptive process in Triatominae. We propose that those species that inhabit less stable habitats possess more types of sensilla on the pedicel, and higher number of antennal sensilla.

Keywords
Chagas disease - sensilla patterns - Triatoma infestans check for this species in other resources - Triatoma brasiliensis check for this species in other resources - Triatoma sordida check for this species in other resources - Triatoma pseudomaculata check for this species in other resources - Rhodnius neglectus check for this species in other resources - Rhodnius nasutus check for this species in other resources

 
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