Gerridae (Insecta: Hemiptera: Gerridae) is divided into eight subfamilies, and Cylindrostethinae is distinguished from the others mainly by the short length of the rostrum and absence of clypeal suture. This subfamily comprises the genera Cylindrostethus, Platygerris and Potamobates, and only the last has been recently revised. The available phylogeny of Cylindrostethus does not include Neotropical species, and there is no proposed phylogeny for Platygerris. Furthermore, there are several phylogenies proposed to Potamobates, however large polytomies still remain, probably due to the low number of characters studied by previous authors. Additionally, the monophyly of Cylindrostethinae was recently tested and not corroborated. In this phase, the PhD project entitled "Review and phylogeny of Cylindrostethinae (Gerridae)" will be developed in the USNM, for the purpose of studying the specimens housed in USNM, with emphasis on Polhemus' and Drake's collections, redescription of poorly known species and description of new morphological characters to be used in a phylogenetic analysis for Cylindrostethinae.
News published in Agência FAPESP Newsletter about the scholarship: