Studies on populations of Lutzomyia longipalpis (Lutz & Neiva, 1912) (Diptera: Psychodidae: Phlebotominae) in Brazil

Memórias do Instituto Oswaldo Cruz

Alfredo Cr De Azevedo²  Fernando A Monteiro¹  Pedro H Cabello¹  Nataly A De Souza²  Maria Goreti Rosa-freitas¹  Elizabeth F Rangel² 

[1] ,Instituto Oswaldo Cruz Departamento de Entomologia

关键词: Lutzomyia longipalpis;    Phlebotominae;    taxonomy;    morphology;    Brazil;   

DOI  :  10.1590/S0074-02762000000300005

来源: SciELO

【 摘 要 】

Studies were performed on five Brazilian populations of Lutzomyia longipalpis: Salvaterra (PA), São José do Ribamar (MA), Canindé (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 Canindé 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.

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