New Species Of Leporinus From The Rio Tapajós Basin, Brazil, And Redescription Of L Moralesi (characiformes: Anostomidae)

Leporinus moralesi is a poorly known species from central Amazon basin, Brazil, which is redescribed based on examination of type specimens and additional material The species is diagnosed by having a dark midlateral stripe running from the vertical through the dorsal fin to the end of the middle caudal-fin rays, 35 to 38 lateral-line scales, five scale rows between the dorsal fin and the lateral line, four or five scale rows between the lateral line and the pelvic fin, 16 scale rows around the caudal peduncle, three teeth on the premaxilla and four on the dentary Leporinus uatumaensis, described from the Rio Uatumã, a tributary of the Rio Amazonas immediately downstream from Manaus, is a junior synonym of L moralesi A lectotype is designated herein for Leporinus muelleri (=L moralesi) In addition, a new species of Leporinus from the Rio Tapajós, Pará, Brazil, is described The new species shares with Leporinus moralesi the presence of symphyseal tooth of the premaxilla with two cusps of similar size in all examined specimens, and middle caudal-fin rays dark, but differs by the dark midlateral stripe beginning at the snout to the end of the middle caudal-fin rays Leporinus moralesi é uma espécie pouco conhecida na Amazônia Central, Brasil, e que é aqui redescrita com base no exame dos exemplares da série tipo e de material adicional A espécie é diagnosticada por ter uma listra escura da vertical que passa pela nadadeira dorsal à nadadeira caudal, estendida sobre os raios medianos da caudal, 35 a 38 escamas na linha lateral, cinco séries de escamas entre a nadadeira dorsal e a linha lateral, quatro ou cinco séries de escamas entre a linha lateral e a nadadeira pélvica, 16 séries de escamas ao redor do pedúnculo caudal, três dentes no pré-maxilar e quatro no dentário Leporinus uatumaensis, descrita do Rio Uatumã, um tributário da margem esquerda do Rio Amazonas pouco a jusante de Manaus, é aqui considerada sinônimo júnior de L moralesi A série tipo de Leporinus muelleri (L moralesi) foi examinada e um lectótipo é aqui designado Além disso, uma espécie nova de Leporinus do Rio Tapajós, Pará, Brasil, é descrita A espécie nova compartilha com Leporinus moralesi a presença de dente sinfisiano no pré-maxilar com duas cúspides de tamanho similar em todos os exemplares examinados, e os raios medianos da nadadeira caudal escuros, mas difere desta por ter uma listra escura da ponta do focinho até a nadadeira caudal © 2013 by the American Society of Ichthyologists and Herpetologists.2238247Birindelli, J.L.O., Britski, H.A., New species of the genus Leporinus Agassiz (Characiformes: Anostomidae) from the rio Curuá, rio Xingu basin, Serra do Cachimbo, Brazil, with comments on Leporinus reticulatus (2009) Neotropical Ichthyology, 7, pp. 1-10Bogotá-Gregory, J.D., Maldonado-Ocampo, J.A., Peces de la zona hidrogeográfica de la Amazonia, Colombia (2006) Biota Colombiana, 7, pp. 55-94Borodin, N.A., Notes on some species and subspecies of genus Leporinus Spix (1929) Memoirs of the Museum of Comparative Zoology, 50, pp. 269-290Britski, H.A., Birindelli, J.L.O., Description of a new species of the genus Leporinus Spix (Characiformes: Anostomidae) from the rio Araguaia, with comments on the taxonomy of L parae and L lacustris (2008) Neotropical Ichthyology, 6, pp. 45-51Britski, H.A., Garavello, J.C., Sobre leporinus octofasciatus steindachner da bacia do paraná (pisces, anostomidae) (1978) Papéis Avulsos de Zoologia, 31, pp. 237-250Britski, H.A., Garavello, J.C., Duas novas espécies do gênero Leporinus Spix, 1829, da bacia do alto Paraná (Teleostei, Anostomidae) (1987) Comunicações Do Museu de Ciências e Tecnologia da PUCRS, 44, pp. 153-165Britski, H.A., Garavello, J.C., Família Anostomidae (2007) Catálogo das Espécies de Peixes de Água Doce Do Brasil, pp. 23-27. , P A Buckup, N A Menezes, and M S A Ghazzi (eds.) 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New Species Of Pseudanos Winterbottom, 1980 (characiformes: Anostomidae), With Notes On The Taxonomy Of P. Gracilis And P. Trimaculatus

A new species of Pseudanos (Characiformes, Anostomidae) is described from the Rio Negro in Brazil, and the Río Casiquiare and Río Atabapo, in Venezuela. Specimens of the new species were previously mistakenly identified as Pseudanos gracilis. The new species is diagnosed by having three branchiostegal rays (vs. four in P. gracilis and most specimens of P. winterbottomi), dark transversal bars on dorsum absent (vs. present in P. trimaculatus), dark spots present on the center of each body scale, forming conspicuous, straight dark lines (vs. dark spots absent in P. gracilis and in some specimens of P. trimaculatus), four midlateral dark blotches on body (vs. usually two, sometimes three or four in P. trimaculatus, or body lacking midlateral blotches and presenting instead a broad midlateral stripe in P. winterbottomi), angle of dorsal and ventralmost radii of body scales between 40° and 90° (vs. angle between 110° and 180° in P. gracilis and P. trimaculatus), and cranial fontanel opened along its entire length (vs. cranial fontanel partially closed in P. trimaculatus). Type specimens and extensive additional material of Pseudanos gracilis and P. trimaculatus were examined and comments on the taxonomy of both species are provided. Pseudanos irinae is herein considered a junior synonym of P. trimaculatus. In addition, an updated key to identification of valid species of Pseudanos is presented. Copyright © 2012 Magnolia Press.34255568Goulding, M., Carvalho, M.L., Ferreira, E.G., (1988) Rio Negro: Rich Life in Poor Water, 200p. , SPB Academic Publishing, HagueKner, R., Beiträge zur Familie der Characinen. Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften (1858) Mathematisch-Naturwissenschaftliche Classe, 30 (13), pp. 75-80Lima, F.C.T., Ribeiro, A.C., Continental-scale tectonic controls of biogeography and ecology (2011) Historical Biogeography of Neotropical Freshwater Fishes, pp. 145-164. , Albert, J.S. & Reis, R.E. (Eds.) University of California Press, BerkeleySidlauskas, B.L., Dos Santos, G.M., Pseudanos winterbottomi: A new anostomine species (Teleostei: Characiformes: Anostomidae) from Venezuela and Brazil, and comments on its phylogenetic relationships (2005) Copeia, (1), pp. 109-123Sidlauskas, B.L., Vari, R.P., Phylogenetic relationships within the South American fish family Anostomidae (Teleostei, Ostariophysi, Characiformes) (2008) Zoological Journal of the Linnean Society, 154, pp. 70-210Taphorn, D.C., The Characiform fishes of the Apure river drainage, Venezuela (1992) Biolania, 4, pp. 1-538Taylor, R., Van Dyke, C.C., Revised procedures for staining and clearing small fishes and other vertebrates for bone and cartilage study (1985) Cybium, 9, pp. 107-119Vanzolini, P.E., As viagens de Johann Natterer no Brasil, 1817-1835 (1993) Papéis Avulsos de Zoologia, 38 (3), pp. 17-60Vari, R.P., Phylogenetic relationships of the families Curimatidae, Prochilodontidae, Anostomidae, and Chilodontidae (Pisces: Characiformes) (1983) Smithsonian Contributions to Zoology, 378, pp. 1-60Weitzman, S.H., The osteology of Bryxon meeki, a generalized characid fish, with an osteological definition of the family (1962) Stanford Ichthyological Bulletin, 8, pp. 1-77Winemiller, K.O., Willis, S.C., The Vaupes arch and Casiquiare canal-barriers and passages (2011) Historical Biogeography of Neotropical Freshwater Fishes, pp. 225-242. , J.S. Albert & Reis, R.E. (Eds.) University of California Press, BerkeleyWinemiller, K.O., López-Fernández, H., Taphorn, D.C., Nico, L.G., Duque, A.B., Fish assemblages of the Casiquiare River, a corridor and zoogeographical filter for dispersal between the Orinoco and Amazon basins (2008) Journal of Biogeography, 35, pp. 1551-1563Winterbottom, R., Systematics, osteology and phylogenetic relationships of fishes of the ostariophysian subfamily Anostominae (Characoidei, Anostomidae) (1980) Life Sciences Contribution Royal Ontario Museum, 123, pp. 1-11