Estudo taxonônico de Entomobrya Rondani, 1861 (Collembola: Entomobryidae) da Amazônia brasileira

Abstract

Entomobryinae is the largest subfamily of Entomobryidae, with about 830 species in 30 genera. Entomobrya Rondani, 1981 is the type genus and stands out for it's great representation in the world, about 334 species, of which 15 were registered in Brazil. On the other hand, the knowledge about the richness and distribution of species still of representing the reality. In Brazilian Amazon, currently Entomobrya are lower, although the phytogeographic region has large taxonomic potential to be explored. Considering that Entomobrya species usually diagnosed based on coloration pattern, the descriptions of Amazonian species are older and present few morphological characters described, therefore do not provide a safe diagnosis for identification. Furthermore, the type material of these species has been burned and lost. Considering the context, here herein Entomobrya species from Brazilian Amazon is reviewed, including a new dorsal chaetotaxy interpretation based in juveniles‘ development of E. egleri. The Amazonian species: E. paroara Arlé & Guimarães, 1978, E. egleri Arlé & Guimarães, 1978, and E. uambae Arlé, 1959 are redescribed, neotypes designated, and their dorsal macrochetotaxy is revealed for the first time. In addition, six new species are described: E. sp. nov. 1, E. sp. nov. 2, E. sp. nov. 3, E. sp. nov. 4, E. sp. nov. 5 and E. sp. nov. 6. All these species from the Brazilian Amazon (except E. sp. nov. 3), share the prelabral chaetae smooth and bifurcate, whose characteristic within the genus is exclusive to these species. Furthermore, E. linda Soto-Adames, 2002 is herein recorded for the first time to Brazil. After our revision, the number of Entomobrya species in Brazil increased from 15 to 22 species (18 endemic), and the genus is now recorded in 18 Brazilian states, including eight states that comprise the Amazon biome. These are the first records of the genus in Acre, Maranhão, Rondônia, and Roraima states. Finally, an identification key for the 22 Entomobrya species recorded in Brazil is provided.