The adults of Camelobaetidiusjanae Dominique & Thomas, 2001 and C. yacutinga Nieto, 2003, with a new synonym for C. leentvaari Demoulin, 1966 (Ephemeroptera: Baetidae).

The genus Camelobaetidius Demoulin, 1966 has 39 species distributed throughout the Nearctic and Neotropical Regions, being one of the most studied genera of the family Baetidae. Based on material from Brazil, the aim of the present paper is to describe adults of C. janae Dominique & Thomas, 2001 and C. yacutinga Nieto, 2003, and to recognize a new synonym for Camelobaetidius leentvaari Demoulin, 1966 (= C. mantis Traver & Edmunds, 1968 nov. syn.) based on the examination of type material.