ABSTRACT
Illustrated keys for the identification of fourth-instar larvae and adult females of seven genera of mosquitoes are presented, along with the geographic distribution of each species and the known immature habitats. Sixty-seven mosquito species belonging to genera Aedeomyia, Ficalbia, Mimomyia, Hodgesia, Coquillettidia, Mansonia, and Uranotaenia are recognized in Thailand. Hodgesia bailyi and Uranotaenia (Pfc.) abstrusa are included as new country records, and four new undescribed species in the subgenus Uranotaenia are reported.
Subject(s)
Animals , Culicidae/anatomy & histology , Environment , Female , Geography , Insect Vectors/anatomy & histology , Medical Illustration , ThailandABSTRACT
Revision of the Leucosphyrus Group of Anopheles (Cellia) (Diptera, Culicidae). This is a comprehensive revision of 20 species of the Leucosphyrus Group of the Neomyzomyia Series of Anopheles (Cellia). Morphological description of the adults, male and female, male genitalia, pupa and fourth-instar larva are provided for each taxon in addition to bionomics, distribution data and systematic discussion for each species, including diagnostic characters. Identification keys for females and fourth-instar larvae are provided. When possible medical importance of each species is included. Illustrations of of the adults, fourth-instar larvae and pupae are provided. Distribution maps for each species are mainly based on the material examined; however, when possible published data were also used. Tables on adult character variations, fourth-instar larval and pupal setal branching are included as appendices. A neotype for An. takasagoensis Morishita and An. sulawesi Koesoemawinangoen, and a lectotype for An. balabacensis Baisas, are designated. The authorship of An. sulawesi previously cited as Waktoedi is corrected to Koesoemawinangoen.
Revisão do Grupo Leucosphyrus de Anopheles (Cellia) (Diptera, Culicidae). Apresenta-se a revisão taxonômica de 20 espécies do Grupo Leucosphyrus da Série Neomyzomyia de Anopheles (Cellia). Apresentam-se as descrições morfológicas dos adultos, machos e fêmeas, genitália masculina, pupa e larva de quarto estádio, bem como dados de bionomia, distribuição e discussão sistemática para cada espécie, incluindo caracteres diagnósticos. Foram acrescentadas chaves dicotômicas de identificação para as espécies, utilizando caracteres dos adultos fêmeas e larvas de quarto estádio. Quando possível, foram incluídos dados sobre a importância médica de cada espécie. Foram também apresentadas ilustrações dos adultos, das larvas de quarto estádio e das pupas. Os mapas de distribuição das espécies foram elaborados com base no material examinado, no entanto, quando possível utilizou-se dados adicionais publicados na literatura. Fornecem-se tabelas com as variações dos caracteres dos adultos, das cerdas das larvas de quarto estádio das pupas. São designados os neótipos de An. takasagoensis Morishita e An. sulawesi Koesoemawinangoen, e o lectótipo de An. balabacensis Baisas. O nome do autor de An. sulawesi previamente citado como sendo Waktoedi foi corrigido para Koesoemawinangoen.
Subject(s)
Animals , Male , Female , Anopheles/anatomy & histology , Anopheles/classification , Phylogeny , Species Specificity , Larva , PupaABSTRACT
Con motivo de los brotes simultáneos de fiebre amarilla y dengue presunto entre los indios ayoreos durante el primer trimestre de 1982, se procedió a la captura de mosquitos demésticos y silvestres en Rincón del Tigre, Bolivia, del 8 al 27 de mayo de 1982. No se detectó la presencia de Aedes aegypti. Vectores silvestres del virus de la fiebre amarilla, encontrados en las galerías arbóreas de la zona, eran probablemente los responsables de los casos humanos de fiebre amarilla. Pese a las pruebas serológicas de infecciones anteriores por virus del dengue en Rincón del Tigre, no se obtuvieron aislamientos ni otros indicios que manifestaran la presencia del virus del dengue. Este artículo presenta observaciones sobre la fauna de mosquitos asociados con los medios doméstico y silvestre y expone en detalle los patrones de actividad hematófaga diurna de las especies más abundantes capturadas con cebo humano
Subject(s)
History, 20th Century , Aedes , Insect Control/methods , Bolivia , Dengue/prevention & control , Yellow Fever/prevention & controlABSTRACT
Recent studies on cytogenetics, behavioral, geographical and distinct morphological characters on adult, pupal and larval stages have revealed that "balabacensis" is a species complex. Anopheles dirus the mainland species, is distributed widely in Thailand and is renowned for its role as primary vector of human malarial parasites. Further, evidence from cytogenetic and taxonomic studies suggests that "An. dirus" is a species complex comprising at least four distinct species provisionally designated: dirus A, B, C and D. These cryptic species are distinguishable only partially morphologically, but can be separated on the basis of metaphase chromosomes using the Giemsa and Hoechst 33258 staining techniques. Apparently, these siblings show distinct patterns of geographic distribution in Thailand and Peninsular Malaysia. The recognition of dirus as a complex of species in Thailand and Peninsular Malaysia requires a re-evaluation of the role that the individual members of this complex have in the transmission of malaria parasites in this region. Cytological analysis of gene rearrangements in ovarian polytene chromosomes has shown that An. maculatus is a sibling-species complex consisting of at least four species in Thailand provisionally designated: maculatus A, B, C and G. These siblings are sympatric in some populations. Furthermore, species B is so highly polymorphic for chromosome rearrangements that four geographic forms can be recognized. It is not known whether these four forms are subspecies or yet further species within the species B complex. These sibling-species must be differentiated in order to understand any differential capabilities in their transmission of human malaria parasites. Anopheles nivipes was elevated from synonymy under An. philippinensis to full species status by Reid, a decision recently confirmed by cross mating experiments. The Thailand Malaria Division does not differentiate these two species and only identifies An. philippinensis, yet, An. nivipes is by far the most common of the two species in Thailand. Furthermore, preliminary surveys of the ovarian polytene chromosomes of several widely separated populations of An. nivipes in Thailand have revealed at least two distinct chromosomal types of nivipes based on fixed inversions on the X chromosomes.