Sistemática de Camelobaetidius Demoulin, 1966 (Insecta: Ephemeroptera: Baetidae)

Abstract

The exemplars of the genus Camelobaetidius Demoulin, 1966 are common in lotic habitats, where the nymphs can be found above rocks, or on fallen trunks in areas of current. They posses a Pan American distribution, from Argentina to Canada. They are considered the sister group of the genus Corinnella Thomas & Dominique, 2006. The genus consists of 44 species, 25 of them are described based only on nymphs, five based on adults, 13 based on nymphs and male imago, and one based on nymph and femele imago. Many species have large area of distribution, with location and longitudinal variation in characters historically considered important for the taxonomy of Baetidae. The genus consists of three morphotypes, which were never tested by phylogenetic analyzes, based on a scientific method, to test if these morphotypes are related, as well as was also never tested the proposal that Dactylobaetis Traver & Edmunds, 1968 was a junior synonym of Camelobaetidius. The aim of this study were: adapt/redescribe descriptions of some species of Camelobaetidius; describe unknown stages of previously known species; inventory the species of Camelobaetidius from different areas of Brazil; present a hypotheses of phylogenetic relationship between species of Camelobaetidius; test the monophyly of the genus based on formal phylogenetic analysis; and develop an identification key to the nymphs of the genus. In this study, the genus Camelobaetidius was considered paraphyletic; was proposed the description of two new genera; where described seven species of Camelobaetidius and one new species of Corinnella; was tested the genetic variability of Camelobaetidius billi based on Cytochrome Oxidase (COI) mitochondrial gene; two adults of the genus Camelobaetidius where described; has been updated the distribution record of the genus; was adequated a methodology for transport and rearing nymhps of Baetidae, and proposed a key to the species of genus Corinnella, New Genus B and Camelobaetidius.