title: Moenkhausia celibela: a new species from the Amazon basin, Brazil (Characiformes: Characidae).
abstract: A new species of Characidae, Moenkhausia celibela, is described from the Rio Amazonas at Santarém, Rio Maraú, several localities in the Rio Tapajós, Rio Curuá-Una, Rio Xingu and Rio Jari, all from the Amazon basin, Brazil. The new species is distinguished from its congeners, except species included in Géry's 1992 Moenkhausia lepidura group, by presenting a dark blotch on the upper caudal-fin lobe, and the lower lobe is hyaline or light grey. Moenkhausia celibela is distinguished from the species of the M. lepidura group by the absence of a humeral spot and the presence of a roughly triangular and dark spot at the caudal-fin base, extending posteriorly along the middle caudal-fin rays, and distinctly separate from the spot on the upper caudal-fin lobe.
authors.affiliation: Museu de Zoologia da Universidade de São Paulo, Caixa Postal 42494, CEP 04299-970, São Paulo, Brazil. manumfm@yahoo.com.br
authors.forename: M M F
authors.initials: MM
authors.lastname: Marinho
authors.forename: F
authors.initials: F
authors.lastname: Langeani
mesh_terms: D000818:Animals; D001938:Brazil; D005399:Fishes / Q000033:anatomy & histology* / Q000145:classification*; D045483:Rivers; D013045:Species Specificity