Abstract
Ectrepopterus uruguayensis Fowler 1943 is redescribed based on the holotype and new series of additional specimensfrom the río Uruguay, río Negro, and small coastal rivers in Uruguay draining to the río de La Plata. Previously proposedsynonyms of Ectrepopterus Fowler 1943 to Megalamphodus Eigenmann 1915 and Hyphessobrycon Durbin 1908 aretested and refuted. A new diagnosis is presented for the genus based on the following apomorphies: foramen in posteriorregion of metapterygoid forms an incomplete arch, bordered posteriorly by the hyomandibula; pectoral-fin rays bearinghooks; posterior margin of second infraorbital posteroventrally oblique and second infraorbital ventrally borderinganterior region of third infraorbital; fourth infraorbital more developed longitudinally than dorsoventrally; ascending process of premaxilla reaching just anterior end of nasal; and lateral line interrupted.References
Azevedo, M.A. (2011) Reproductive characteristics of characid fish species (Teleostei, Characiformes) and their relationship with body size and phylogeny. Iheringia, Série Zoologia, 100, 469–482.
Azpelicueta, M.M. & Garcia, J.O. (2000) A new species of Astyanax (Characiformes, Characidae) from Uruguay river basin in Argentina, with remarks on hook presence in Characidae. Revue suisse de Zoologie, 107, 245–257.
Baicere-Silva, C.M., Ferreira, K.M., Malabarba, L.R., Benine, R.C. & Quagio-Grassiotto, I. (2011) Spermatic characteristics and sperm evolution on the subfamily Stevardiinae (Ostariophysi: Characiformes: Characidae). Neotropical Ichthyology, 9, 377–392.
Bertaco, V.A. & Carvalho, T.P. (2005) A new characid fish, Hyphessobrycon hexastichos (Characiformes: Characidae) from Chapada dos Parecis, Mato Grosso, Brazil. Neotropical Ichthyology, 3, 439–443.
Bertaco, V.A. & Garutti, V. (2007) New Astyanax from the upper rio Tapajós drainage, central Brazil (Characiformes: Characidae). Neotropical Ichthyology, 5, 25–30.
Britski, H.A. & Lima, F.C.T. (2008) A new species of Hemigrammus from the upper Rio Tapajós basin in Brazil (Teleostei: Characiformes: Characidae). Copeia, 2008, 565–559.
Calcagnotto, D., Schaeffer, S.A. & DeSalle, R. (2005) Relationships among characiform fishes inferred from analysis of nuclear and mitochondrial gene sequences. Molecular Phylogenetics and Evolution, 36, 135–153.
Eigenmann, C.H. (1918) The American Characidae [Part 2]. Memoirs of the Museum of Comparative Zoology, 43, 103–208.
Eigenmann, C.H. (1921) The American Characidae [Part 3]. Memoirs of the Museum of Comparative Zoology, 43, 209–310.
Eschmeyer, W.N. & Fricke, R. (Eds.) (2011) Catalog of Fishes. Electronic version – 10 February 2011. California Academy of Sciences. Avalaible from: http://research.calacademy.org/ichthyology/catalog/fishcatmain.asp (February 21, 2011)
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 of Zoology, 172, 1–46.
Fowler, H.W. (1943) Notes and descriptions of new or little known fishes from Uruguay. Proceedings of the Academy of Natural Science of Philadelphia, 95, 311–334.
Géry, J. (1972) Corrected and supplemented descriptions of certain characoid fishes described by Henry W. Fowler, with revisions of several of their genera. Studies on the Neotropical Fauna, 7, 1–35.
Géry, J. (1977) Characoids of the World. T.H.F. Publications, Neptune City, NJ, 672p.
Javonillo, R., Malabarba, L.R., Weitzman, S.H. & Burns, J.R. (2010) Relationships among major lineages of characid fishes (Teleostei: Ostariophysi: Characiformes), based on molecular sequence data. Molecular Phylogenetics and Evolution, 54, 498–511.
Lima, F.C.T. & Moreira, C.R. (2003) Three new species of Hyphessobrycon (Characiformes: Characidae) from the upper rio Araguaia basin in Brazil. Neotropical Ichthyology, 1, 21–33.
Malabarba, L.R. (1998) Monophyly of the Cheirodontinae, characters and major Clades (Ostariophysi: Characidae). Pp. 199–233. In: Malabarba, L.R., Reis, R.E. Vari, R.P., Lucena, Z.M.S. & Lucena, C.A.S. (Orgs.). Phylogeny and classification of Neotropical fishes. Edipucrs, Porto Alegre, 603p.
Malabarba, L.R. & Weitzman, S.H. (2003) Description of new genus with six new species from southern Brazil, Uruguay and Argentina, with a discussion of a putative characid clade (Teleostei: Characiformes: Characidae). Comunicações do Museu de Ciências e Tecnologia da PUCRS, Série Zoologia, 16, 67–151.
Menni, R.C. (2004) Peces y ambientes en la Argentina continental. Monografias del Museo Argentino de Ciencias Naturales, No 5, Buenos Aires, 316p.
Mirande, J.M. (2009) Weighted parsimony phylogeny of the family Characidae (Teleostei: Characiformes). Cladistics, 2, 574–613.
Mirande, J.M. (2010) Phylogeny of the family Characidae (Teleostei: Characiformes): from characters to taxonomy. Neotropical Ichthyology, 8, 385–568.
Taylor, W.R. & van Dyke, G.C. (1985) Revised procedures for staining and clearing small fishes and other vertebrates for bone and cartilage study. Cybium, 9, 107–119.
Thomaz, A.T., Malabarba, L.R. & Bonatto, S.L. (2010) The phylogenetic placement of Hollandichthys Eigenmann 1909 (Teleostei: Characidae) and related genera. Molecular Phylogenetics and Evolution, 57, 1347–1352.
Weiss, F.E., Malabarba, L.R. & Malabarba, M.C. (In press) Phylogenetic relationships of Paleotetra, a new characiform genus (Ostariophysi) with two new species from the Eocene-Oligocene of southeastern Brazil. Journal of Systematic Palaeontology.
Weitzman, S.H. (1962) The osteology of Brycon meeki, a generalized characid fish, with an osteological definition of the family. Stanford Ichthyology Bulletin, 8, 1–77.
Weitzman, S.H. & Palmer, L. (1997) A new species Hyphessobrycon (Teleostei: Characidae) from the Neblina region of Venezuela and Brazil, with comments on the putative ‘rosy tetra clade’. Ichthyological Exploration of Freshwaters, 7, 209–242.
Zanata, A.M. & Ohara, W.M. (2009) Jupiaba citrina, a new species from rio Aripuanã, rio Madeira basin, Amazonas and Mato Grosso states, Brazil (Characiformes: Characidae). Neotropical Ichthyology, 7, 513–518.