title: Fine structure and distribution pattern of antennal sensilla of Lutzomyia longipalpis (Diptera: Psychodidae) sand flies.
abstract: The specific aims of this work were to examine the antennal sensilla of Lutzomyia longipalpis (Lutz & Neiva 1912) (Diptera: Psychodidae) adults and to characterize their typology and topography, with special attention to olfactory sensilla. The surfaces of the antennal segments of Lu. longipalpis males and females were studied by scanning electron microscopy (SEM). Lu. longipalpis used in the current study were obtained from a colony originating from Lapinha Cave, Minas Gerais state, Brazil. Microtrichiae and 11 subtypes of sensilla were observed and characterized according to the following categories: five subtypes of trichoid sensilla (short, medium, long blunt-tipped, long pointed-tipped, and apical), two coeloconic sensilla (grooved and praying hands), and campaniform, chaetic, basiconic, and squamiform sensilla. SEM analyses showed few differences between males and females in the typology, topography, and quantity of antennal sensilla described. The current study is the first to identify several categories of antennal sensilla of the genus Lutzomyia and their distribution patterns. The identification of these sensillar types may be important in planning future electrophysiological studies to develop alternative measures of control and monitoring of Lu. longipalpis.
authors.affiliation: Laboratory of Medical and Veterinary Arthropodology, Division of Entomology, Institute of Tropical Pathology and Public Health, Federal University of Goiás, 74.605-050, Caixa Postal 131, Goiânia, Goiás, Brazil. fernandesff@pesquisador.cnpq.br
authors.forename: Fernando de Freitas
authors.initials: Fde F
authors.lastname: Fernandes
authors.forename: Ana Cristina
authors.initials: AC
authors.lastname: Bahia-Nascimento
authors.forename: Luciana Conceição
authors.initials: LC
authors.lastname: Pinto
authors.forename: Cynthia de Sousa
authors.initials: Cde S
authors.lastname: Leal
authors.forename: Nágila Francinete Costa
authors.initials: NF
authors.lastname: Secundino
authors.forename: Paulo Filemon Paolucci
authors.initials: PF
authors.lastname: Pimenta
mesh_terms: D000818:Animals; D002628:Chemoreceptor Cells / Q000648:ultrastructure*; D005260:Female; D006257:Head / Q000033:anatomy & histology; D008297:Male; D011576:Psychodidae / Q000648:ultrastructure*; D012727:Sex Characteristics