Skip to main content Skip to main navigation menu Skip to site footer
Published: 2016-03-24

A new species of Moenkhausia Eigenmann, 1903 (Characiformes, Characidae) from the rio Amazonas basin, Brazil

Universidade Santa Cecília, Rua Oswaldo Cruz 277, Boqueirão, CEP 11045-907, Santos, SP, Brazil.
Museu de Zoologia da Universidade de São Paulo, Avenida Nazaré 481, Ipiranga, CEP 04203-001, São Paulo, SP, Brazil
Pisces Moenkhausia lepidura group taxonomy freshwater Moenkhausia megalops


Moenkhausia abyss is herein described from the rio Amazonas basin lowlands. The new species can be distinguished from the congeners by presenting the combination of the following characters: a dark blotch located on the upper caudal-fin lobe and the lower lobe hyaline, 25–29 branched anal-fin rays, humeral spot rectangular, vertically oriented, extending horizontally through two or two and a half scales and located over the third to the fifth lateral line scales, five longitudinal scale rows above the lateral line, predorsal scales arranged in a single not interrupted median row and 30–34 perforated lateral line scales. Brief comments on Moenkhausia megalops are provided.



  1. Benine, R.C. (2004) Análise filogenética do gênero Moenkhausia Eigenmann, 1903, (Characiformes: Characidae), com uma revisão dos táxons do alto rio Paraná. Unpublished Ph. D. Dissertation, Universidade Estadual Paulista, Instituto de Biociências, Botucatu, São Paulo, 317 pp.

    Bertaco, V.A., Jerep, F.C. & Carvalho, F.R. (2011a) New species of Moenkhausia Eigenmann (Ostariophysi: Characidae) from the upper Rio Tocantins basin in central Brazil. Neotropical Ichthyology, 9, 57–63.

    Bertaco, V.A., Jerep, F.C. & Carvalho, F.R. (2011b) A new characid fish, Moenkhausia aurantia (Ostariophysi: Characiformes: Characidae), from the upper rio Tocantins basin in central Brazil. Zootaxa, 2934, 29–38.

    Costa, W.J.E.M. (1994) Description of two new species of the genus Moenkhausia (Characiformes: Characidae) from the central Brazil. Zoologischer Anzeiger, 232, 21– 29.

    Eigenmann, C.H. (1903) New genera of South American fresh-water fishes and new names for some old genera. Smithsonian Miscellaneous Collections, 45, 144–148.

    Eigenmann, C.H. (1917) The American Characidae–I. Memoirs of the Museum of Comparative Zoology, 43, 1–102.

    Fink, W.L. & Weitzman, S.H. (1974) The so-called Cheirodontin fishes of Central America with descriptions of two new species (Pisces: Characidae). Smithsonian Contributions to Zoology, 172, 1–46.

    Géry, J. (1977) Characoids of the world. TFH Publications, Neptune City, New Jersey, 672 pp.

    Géry, J. (1992) Description de deux nouvelles espèces proches de Moenkhausia lepidura (Kner) (Poissons, Characiformes, Tetragonopterinae), avec une revue du groupe. Revue Française d’Aquariologie and Herpètologie 19, 69–78.

    Lima, F.C.T. & Toledo-Piza, M. (2001) New Species of Moenkhausia (Characiforms: Characidae) from the Rio Negro of Brazil. Copeia, 4, 1058–1063.[1058:NSOMCC]2.0.CO;2

    Lima, F.C.T., Malabarba, L.R., Buckup, P.A., Silva, J.F.P., Vari, R.P., Harold, A.,Benine, R.C., Oyakawa, O.T., Pavanelli, C.S., Menezes, N.A., Lucena, C.A.S., Reis,R.E., Langeani, F., Casatti, L., Bertaco, V.A., Moreira, C.R. & Lucinda, P.H.F. (2003) Genera Incertae Sedis in Characidae. In: Reis, R.E., Kullander, S.O. & Ferraris, C.J. Jr. (Eds.), Check List of the Freshwater fishes of South and Central America. Edipucrs, Porto Alegre, pp. 106–169.

    Lima, F.C.T., Britski, H.A. & Machado, F.A. (2007) A new Moenkhausia (Characiformes: Characidae) from central Brazil, with comments on the area relationship between the upper rio Tapajós and upper rio Paraguai systems. Aqua, International Journal of Ichthyology, 13 (2), 45–54.

    Lima, F.C.T., Pires, T.H.S., Ohara, W.M.F., Jerep, C., Carvalho, F.R., Marinho, M.M.F. & Zuanon, J.A.S. (2013) Characidae. In: Queiroz, L.J., Torrente-Vilara, G., Ohara, W.M., Pires, T.H.S., Zuanon, J.A.S. & Dória, C.R.C. (Eds.), Peixes do rio Madeira. Vol. I. Dialeto, São Paulo, pp. 213–361.

    Lucinda, P.H., Malabarba, L.R. & Benine, R.C. (2007) On a new species of the genus Moenkhausia Eigenmann (Ostariophysi: Characidae). Zootaxa, 1525 (1), 61–68.

    Mariguela, T.C., Benine, R.C., Abe, K.T., Avelino, G.S. & Oliveira, C. (2013) Molecular phylogeny of Moenkhausia (Characidae) inferred from mitochondrial and nuclear DNA evidence. Journal of Zoological Systematics and Evolutionary Research, 51, 327–332.

    Marinho, M.M.F. & Langeani, F. (2010) Moenkhausia celibela: a new species from the Amazon basin, Brazil (Characiformes: Characidae). Journal of fish biology, 77 (4), 879–889.

    Marinho, M.M.F. & Langeani, F. (2010) A new species of Moenkhausia from the rio Amazonas and rio Orinoco basins (Characiformes: Characidae). Zootaxa, 2577, 57–68.

    Menezes, N.A. & Weitzman, S.H. (1990) Two new species of Mimagoniates (Teleostei: Characidae: Glandulocaudinae), their phylogeny and biogeography and a key to the glandulocaudin fishes of Brazil and Paraguay. Proceedings of the Biological Society of Washington, 103, 380–426.

    Mirande, J.M. (2010) Phylogeny of the family Characidae (Teleostei: Characiformes): from characters to taxonomy. Neotropical Ichthyology, 8 (3), 385–568.

    Pastana, M.N. & Dagosta, F.C. (2014) Moenkhausia rubra, a new species from rio Juruena, upper rio Tapajós basin, Brazil (Characiformes: Characidae). Neotropical Ichthyology, 12 (2), 389–396.

    Taylor, W.R. & Van Dyke, G.C. (1985) Revised procedures for staining and clearing small fishes and other vertebrates for bone and cartilage. Cybium, 9, 107–119.