Taxonomia de Entomobryoidea (Collembola, Hexapoda) em uma área de cerrado no Brasil
Springtails are microhexapods associated to different habitats, especially to humid edaphic environments. There is currently about 9,200 nominal species of springtails, most of them found in temperate regions, and the deficit in the coverage of taxonomic studies from tropical regions is apparent....
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| Formato: | Dissertação |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/32690 |
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| Resumo: | Springtails are microhexapods associated to different habitats, especially to humid
edaphic environments. There is currently about 9,200 nominal species of springtails, most
of them found in temperate regions, and the deficit in the coverage of taxonomic studies
from tropical regions is apparent. The Entomobryomorpha is the most diverse order of
Collembola, holding almost 4000 described species. It also houses the largest
superfamily, Entomobryoidea, which has a wide distribution and consists of three
families: Orchesellidae, Entomobryidae and Paronellidae. In Brazil there are 445 species
registered in all regions, with most of them recorded from the Atlantic and the Amazon
Forests.The Cerrado is second largest biome in Brazil, and although it is one of the world's
biodiversity hotspots, it is undersampled for the Collembola fauna. Thus, this study aimed
to carry out the first taxonomic study of the Entomobryoidea fauna from the Chapada dos
Guimarães, Mato Grosso, Brazil. at the samples were collected from 12 sites using pitfall
traps for two days. The biological material was stored in 70% alcohol, screened and
assembled to identification and morphological study. Specimens representing the new
species were drawn and described following the literature. Four species of
Entomobryoidea were identified in this study, all new to science: Trogolaphysa sp. nov.,
Entomobrya sp. nov., Salina sp. nov and Seira sp. nov. The four taxa are similar to other
Neotropical congeners, but they have a distinctive morphology related to the dorsal and
ventral tube chaetotaxy and/or the morphology of the empodial complex. Despite being
more common in humid forest environments, Entomobrya sp. nov. is the record of the
genus for the Cerrado domain. Our data represents a increase of 28,5% in the number of
species previously recognized for the Brazilian Cerrado, and suggests that the domain
may shelter a rich fauna of Collembola. Therefore, inventories, ecological and
biogeographic studies, mainly within protected areas, are necessary for the conservation
and understanding of the group's distribution within the Cerrado. |
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