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Chemical analysis of oxygenated homosesquiterpenes: a putative sex pheromone from Lutzomyia lichyi (Diptera: Psychodidae)

Published online by Cambridge University Press:  09 March 2007

J.G.C. Hamilton ,
R.P. Brazil ,
E.D. Morgan  and
B. Alexander
J.G.C. Hamilton*
Affiliation:
Chemical Ecology Group, Centre for Applied Entomology and Parasitology, School of Life Sciences, University of Keele, Staffordshire, ST5 5BG, England, UK
R.P. Brazil
Affiliation:
Centro de Pesquisas Rene Rachou, Laboratorio de Leishmanioses, Av. Augusto de Lima 1715, Belo Horizonte, Minas Gerais, Brazil
E.D. Morgan
Affiliation:
Chemical Ecology Group, Centre for Applied Entomology and Parasitology, School of Life Sciences, University of Keele, Staffordshire, ST5 5BG, England, UK
B. Alexander
Affiliation:
Departamento de Parasitologia, Instituto de Ciencias Biologicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Minas Gerais, Brazil
*
* Fax: 01782 583516 E-mail: bia28@keele.ac.uk
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Abstract

Lutzomyia lichyi (Floch & Abbonenc) is a suggested secondary vector of Leishmania in Colombia. Taxonomically, L. lichyi is very closely related to the L. longipalpis (Lutz & Neiva) species complex. Male members of the complex can be distinguished by their sex pheromones which are produced in papules found grouped together in pale patches on tergites 3 or tergites 3 and 4. Male L. lichyi also have papules, very similar in appearance to those of the L. longipalpis species complex but distributed on tergites 4, 5, 6 and 7. Chemical analysis of male L. lichyi hexane extracts has revealed the presence of two novel oxygenated methylsesquiterpenes. The two major oxygenated terpenes found in the extract of L. lichyi males are tentatively characterized as a primary and tertiary alcohol. The mass spectrum of the proposed primary alcohol is very similar to the published mass spectrum of 3-methyl-α-himachalene, the sex pheromone produced by the Jacobina chemotype of the L. longipalpis complex. The mass spectrum of the proposed tertiary alcohol also has similarities to the 3-methyl-α-himachalene sex pheromone.

Type
Research Article
Information
Bulletin of Entomological Research , Volume 89 , Issue 2 , February 1999 , pp. 139 - 145
Copyright
Copyright © Cambridge University Press 1999

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