Museu de Zoologia da Universidade de São Paulo, Caixa Postal 42.494, CEP 04218-970, São Paulo, SP, Brazil. Universidade Federal de São Carlos, Departamento de Ecologia e Biologia Evolutiva, Rodovia Washington Luiz, Km 235, CEP 13.565-905, São Carlos, São Paulo, Brazil. [Email]
Cymodusa ypy sp. nov., the first species of the genus to be formally described from Brazil, is described and illustrated. This record extends significantly the known distribution of the genus in the Neotropical region.