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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 95, No. 3, 2000, pp. 305-322
Bioline Code: oc00053
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 95, No. 3, 2000, pp. 305-322

 en Studies on Populations of Lutzomyia longipalpis (Lutz & Neiva, 1912) (Diptera: Psychodidae: Phlebotominae) in Brazil
Alfredo CR de Azevedo; Fernando A Monteiro; Pedro H Cabello; Nataly A de Souza; Maria Goreti Rosa-Freitas & Elizabeth F Rangel

Abstract

Studies were performed on five Brazilian populations of Lutzomyia longipalpis: Salvaterra (PA), So Jos do Ribamar (MA), Canind (CE), Natal (RN) and Gruta da Lapinha, Lagoa Santa (MG). No morphological differences were observed that could distinguish between these populations. Homogeneity tests showed that the allopatric populations display a certain heterogeneity and that the sympatric populations, with different patterns of spots, are homogeneous. The Student-Newman-Keuls test, represented by Euler-Venn diagrams, showed a disjunction between the populations from the north/northeast and the one from Gruta da Lapinha. Genetic distances between the four populations (excluding the Canind population) were within the range of intrapopulational differences. The Gruta da Lapinha population displayed a heterozygotic deficiency that could be a consequence of high levels of inbreeding due to cryptic habits of living in a small cave. These results do not favor the hypothesis of a L. longipalpis species complex in Brazil, and the species should be considered high polymorphic.

Keywords
Lutzomyia longipalpis, Phlebotominae, taxonomy, morphology, Brazil

 
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