Gyrinidae (Coleoptera) da Amazônia Central, Brasil: taxonomia e bionomia
Gyrinidae is one of the less-studied aquatic Coleoptera families in Brazil. In addition, information about species in the state of Amazonas has been restricted to species descriptions and species records that are brief and often obsolete. The aim of the present study was therefore to increase knowle...
| Autor principal: | Colpani, Daniara |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/12400 http://lattes.cnpq.br/6998770061553811 |
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Gyrinidae is one of the less-studied aquatic Coleoptera families in Brazil. In addition, information about species in the state of Amazonas has been restricted to species descriptions and species records that are brief and often obsolete. The aim of the present study was therefore to increase knowledge of the taxonomy and biology of Gyrinidae species in Central Amazonia. Samples were collected in six municipalities in the State: Manaus, Presidente Figueiredo, Iranduba, Careiro da Várzea, Barcelos and Rio Preto da Eva. Additional material from INPA’s Aquatic Insects Laboratory was also used. Sampling was done with an entomological sweep net in lakes, rivers, streams and pools. Some adults and eggs were transported in plastic containers with water for rearing in the laboratory. Two larval stages and the eggs of Gyretes nubilus Ochs, 1965 were associated by means of oviposition under laboratory conditions. Of 12 species sampled in the study area, nine belonging to the genus Gyretes Brullé and three to Gyrinus Müller. The species recorded were characterized morphologically and bionomic information was provided. The mitochondrial gene Cytochrome oxidase subunit I (COI) was used for the molecular association between adults and immatures of the species Gyretes nubilus Ochs,1965 and G. minax Ochs,1967. Since, the eggs of these species were described using optical and scanning electron microscopy. In addition, the first and second larval stages of G. nubilus were described and adults of 12 species were redescribed. This study represents the first contribution to knowledge of the immatures of Gyrinidae species in Brazil. The study increases knowledge about the diversity of species of this family in Central Amazonia, in addition to providing detailed morphological characterizations of the species sampled in the study area, which will facilitate the identification of these species. |