Wing Geometry as a Tool for Studying the Lutzomyia longipalpis (Diptera: Psychodidae) Complex

Toro Toro (T) and Yungas (Y) have been described as genetically well differentiated populations of the Lutzomyia longipalpis (Lutz & Neiva, 1912) complex in Bolivia. Here we use geometric morphometrics to compare samples from these populations and new populations (Bolivia and Nicaragua), represe...

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Bibliographic Details
Published in:Memórias do Instituto Oswaldo Cruz 2001-11, Vol.96 (8), p.1089-1094
Main Authors: De la Riva, J, Le Pont, F, Ali, V, Matias, A, Mollinedo, S, Dujardin, J P
Format: Article
Language:English
Subjects:
Animals
Bolivia
centroid size
geometric morphometrics
Insect Vectors - anatomy & histology
landmarks
Leishmania chagasi
Lutzomyia longipalpis
Lutzomyia longipalpis, geometric morphometrics, landmarks, centroid size, shape components, Leishmania chagasi, visceral leishmaniasis
Male
Nicaragua
PARASITOLOGY
Psychodidae
Psychodidae - anatomy & histology
shape components
TROPICAL MEDICINE
visceral leishmaniasis
Wings, Animal - anatomy & histology
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Summary:Toro Toro (T) and Yungas (Y) have been described as genetically well differentiated populations of the Lutzomyia longipalpis (Lutz & Neiva, 1912) complex in Bolivia. Here we use geometric morphometrics to compare samples from these populations and new populations (Bolivia and Nicaragua), representing distant geographical origins, qualitative morphological variation ("one-spot" or "two-spots" phenotypes), ecologically distinct traits (peridomestic and silvatic populations), and possibly different epidemiological roles (transmitting or nor transmitting Leishmania chagasi). The Nicaragua (N) (Somotillo) sample was "one-spot" phenotype and a possible peridomestic vector. The Bolivian sample of the Y was also "one-spot" phenotype and a demonstrated peridomestic vector of visceral leishmaniasis (VL). The three remaining samples were silvatic, 'two-spots' phenotypes. Two of them (Uyuni and T) were collected in the highlands of Bolivian where VL never has been reported. The last one (Robore, R) came from the lowlands of Bolivia, where human cases of VL are sporadically reported. The decomposition of metric variation into size and shape by geometric morphometric techniques suggests the existence of two groups (N/Y/R, and U/T). Several arguments indicate that such subdivision of Lu. longipalpis could correspond to different evolutionary units.
ISSN:1678-8060
0074-0276
0074-0276
1678-8060
DOI:10.1590/S0074-02762001000800011