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Cytotaxonomy of Simulium cauchense Floch & Abonnenc and Simulium quadrifidum Lutz (Diptera: Simuliidae) in Brazilian Amazonia
Alvan-Aguilar, Miriam Adriana; Hamada, Neusa; Adler, Peter H; Luz, Sérgio Luiz Bessa.
  • Alvan-Aguilar, Miriam Adriana; Instituto Nacional de Pesquisas da Amazônia. Coordenação de Pesquisas em Entomologia. Divisão de Curso em Entomologia. Manaus. BR
  • Hamada, Neusa; Instituto Nacional de Pesquisas da Amazônia. Coordenação de Pesquisas em Entomologia. Divisão de Curso em Entomologia. Manaus. BR
  • Adler, Peter H; Clemson University. Division of Entomology. Clemson. US
  • Luz, Sérgio Luiz Bessa; Fiocruz. Centro de Pesquisa Leônidas e Maria Deane. Manaus. BR
Mem. Inst. Oswaldo Cruz ; 100(3): 249-257, May 2005. ilus, mapas, tab
Artículo en Inglés | LILACS | ID: lil-411019
RESUMO
Simulium cauchense Floch & Abonnenc and Simulium quadrifidum Lutz are widely distributed in the Amazon region and are morphologically similar at the larval and pupal stages. Chromosomally, these species are readily distinguished by the position of the nucleolar organizer, which is in the short arm of chromosome I in S. cauchense and in the long arm of chromosomes III in S. quadrifidum. They also differ by three fixed inversions. Sex chromosomes are undifferentiated in both species. Chromosomal resolution of the two species allowed us to evaluate four structural features previously used as diagnostic aids at the larval stage. Characters that distinguish larvae of the two species are the number of branches and branching patterns of the dorsal abdominal setae and the dark band on each primary fan. Branching patterns of the gill histoblasts were often diagnostic, with S. quadrifidum exhibiting more proximal branching and S. cauchense more distal branching. Sites where both species occurred sometimes had larvae with one petiole branching proximally and the other distally; in these cases examination of the chromosomes permitted assignment of the specimen to species. Pigmentation patterns of larvae, on the other hand, are highly variable. Color typically is sex linked in both species.
Asunto(s)
Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Simuliidae / Bandeo Cromosómico Límite: Animales País/Región como asunto: America del Sur / Brasil Idioma: Inglés Revista: Mem. Inst. Oswaldo Cruz Asunto de la revista: Medicina Tropical / Parasitología Año: 2005 Tipo del documento: Artículo / Documento de proyecto País de afiliación: Brasil / Estados Unidos Institución/País de afiliación: Clemson University/US / Fiocruz/BR / Instituto Nacional de Pesquisas da Amazônia/BR

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Texto completo: Disponible Índice: LILACS (Américas) Asunto principal: Simuliidae / Bandeo Cromosómico Límite: Animales País/Región como asunto: America del Sur / Brasil Idioma: Inglés Revista: Mem. Inst. Oswaldo Cruz Asunto de la revista: Medicina Tropical / Parasitología Año: 2005 Tipo del documento: Artículo / Documento de proyecto País de afiliación: Brasil / Estados Unidos Institución/País de afiliación: Clemson University/US / Fiocruz/BR / Instituto Nacional de Pesquisas da Amazônia/BR