New species and new records of freshwater Heterolepidoderma (Gastrotricha: Chaetonotidae) from Brazil with an identification key to the genus

A new species of freshwater Heterolepidoderma (Gastrotricha) was found in Brazil. Heterolepidoderma mariae sp. nov. is unique in possessing a three-lobed head, three types of dorsal keeled scales, a thin band of cilia on the head, connecting the two bands of ventral cilia, and an interciliary area with elliptical keeled scales with short spines. Heterolepidoderma famaillense Grosso & Drahg, 1991 is reported for the first time outside the type locality in Argentina, and we make some initial remarks on H. aff. majus Remane, 1927, a possible undescribed species. A dichotomous key for all freshwater species of Heterolepidoderma , with distributional data, is also provided.A new species of freshwater Heterolepidoderma (Gastrotricha) was found in Brazil. Heterolepidoderma mariae sp. nov. is unique in possessing a three-lobed head, three types of dorsal keeled scales, a thin band of cilia on the head, connecting the two bands40574551568CNQP - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO478825/2013-7This work was supported by grants from the Conselho de Pesquisa e Desenvolvimento—CNPq (478825/2013-7) and the Fundo de Apoio ao Ensino, à Pesquisa e Extensão—Unicamp (2031-15). We are thankful to both Anete P. Lourenço and Thiago Q. Araújo for sharin