title: New species and new records of freshwater Heterolepidoderma (Gastrotricha: Chaetonotidae) from Brazil with an identification key to the genus.
abstract: 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.
authors.affiliation: Laboratório de Evolução de Organismos Meiofaunais, Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Caixa Postal 6109, 13083-970, Campinas, São Paulo, Brazil.; Email: arsg@unicamp.br.
authors.forename: André R S
authors.initials: AR
authors.lastname: Garraffoni
authors.affiliation: Laboratório de Evolução de Organismos Meiofaunais, Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Caixa Postal 6109, 13083-970, Campinas, São Paulo, Brazil.; Email: mahri-prado@hotmail.com.
authors.forename: Marina P
authors.initials: MP
authors.lastname: Melchior
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D049628:Body Size; D001938:Brazil; D017753:Ecosystem; D056890:Eukaryota / Q000145:classification* / Q000254:growth & development; D005618:Fresh Water; D009929:Organ Size