title: Eigenmannia besouro, a new species of the Eigenmannia trilineata species-group (Gymnotiformes: Sternopygidae) from the rio São Francisco basin, northeastern Brazil.
abstract: A new species of the Eigenmannia trilineata species-group is described from the rio São Francisco basin, Brazil. It is distinguished from closely related species by a unique set of characters, including a subterminal mouth, the presence of ii,13-14 pectoral-fin rays, a coronomeckelian bone that is 30% the length of Meckel's cartilage, the specific pattern of the dentition of the premaxilla and dentary, and the more anterior origin of the superior midlateral stripe. Comments on species of the E. trilineata species-group are presented.
authors.affiliation: Setor de Ictiologia, Museu de Zoologia da Universidade de São Paulo, Caixa Postal 42694, 04299-970, São Paulo, SP, Brazil.; Email: luizwp@yahoo.com.br.
authors.forename: Luiz Antônio W
authors.initials: LA
authors.lastname: Peixoto
authors.affiliation: Museu Paraense Emílio Goeldi, Caixa Postal 399, 66040-170, Belém, PA, Brazil.; Email: wolmar@museu-goeldi.br.
authors.forename: Wolmar B
authors.initials: WB
authors.lastname: Wosiacki
mesh_terms: D063147:Animal Distribution; D000818:Animals; D049628:Body Size; D001938:Brazil; D005260:Female; D023702:Gymnotiformes / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development; D008297:Male; D009055:Mouth / Q000033:anatomy & histology / Q000254:growth & development; D009929:Organ Size; D014094:Tooth, Deciduous / Q000033:anatomy & histology / Q000254:growth & development