Taxonomia e biogeografia do gênero Neotropical Aganacris Walker, 1871 (Orthoptera: Tettigoniidae: Phaneropterinae)
Over the last 50 years, the genus Aganacris has undergone a lot of taxonomic repositioning and, despite the published papers, very little is known about its distribution and ecological patterns. We analyzed the morphologic characters of Aganacris in order to update its taxonomy. Using Scanning El...
| Autor principal: | Sovano, Rafael Segtowick da Silva |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/12393 http://lattes.cnpq.br/0782811113748782 |
| Resumo: |
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Over the last 50 years, the genus Aganacris has undergone a lot of taxonomic repositioning
and, despite the published papers, very little is known about its distribution and ecological
patterns. We analyzed the morphologic characters of Aganacris in order to update its
taxonomy. Using Scanning Electron Microscopy (SEM) and morphometry, we were able to
more accurately study the species inside Aganacris. As a complementary method, we used
infra-red spectrum to correctly pair up males and females. In addition, we investigated the
potential spatial distribution of Aganacris species to imply ecological patterns and niche
overlapping. The results showed a significant morphologic differentiation between-males and
-females, which, ultimately, led us to revalidate A. sphex (Rehn) and describe its female for
the very first time. The models of potential distribution revealed that A. velutina (Kirby) is
associated with high-altitude tropical shrublands, A. sphex (Rehn) is more likely to occur in
opened areas, and A. nitida (Perty) should be adapted to more closed dense forests. Even
though we did not describe any new species, we did add new characters to Grant’s 1958
descriptions and provide identification keys, for both males and females. It was strengthened
the capacity of the infra-red spectrum to reproduce phenotypic (intra-specific variation) and
geographic isolation patterns (inter-specific variation) of Aganacris populations. In this light,
such a method is for the first time used to help solving a taxonomic problem. |