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Description of three new species of Moenkhausia (Teleostei, Characiformes, Characidae) with the definition of the Moenkhausia jamesi species complex



From the examination of extensive comparative material currently identified as M. jamesi we verified that there are, at least, three new species under this name. These, along with M. jamesi and M. justae, form what we herein called the M. jamesi species complex, by sharing the following group of characters: a short maxilla, with its distal margin not exceeding anterior third of the second infraorbital; first through third teeth of the inner row of premaxilla and first and second dentary teeth with cusps arranged in a pronounced arch, humeral spot positioned between the fourth and seventh scales of the lateral line and extending up to four scale rows above the lateral line and one scale row below the lateral line, and a vertically oval to round spot at the base of the caudal fin rays. Moenkhausia ischyognatha sp. n., from Rio Xingu basin, differs from the other species of the complex by its lower head depth. Moenkhausia alesis sp. n., from the river system Tocantins-Araguaia, differs from M. jamesi, M. ischyognatha, and M. sthenosthoma by the number of scale rows above the lateral line. Moenkhausia sthenosthoma sp. n., from the Rio Madeira basin, differs from M. jamesi by the number of scale rows between the lateral line and the midventral scale series. Moenkhausia justae can be diagnosed from the other species of the complex by having a tri to pentacuspidate tooth on the maxilla.



Moenkhausia justae, taxonomic revision, Systematics, Neotropical region

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Bellafronte, E., Mariguela, T.C., Pereira, L.H.G., Oliveira, C. & Moreira-Filho, O. (2013) DNA barcode of Parodontidae species from the La Plata river basin–applying new data to clarify taxonomic problems. Neotropical Ichthyology, 11 (3), 497–506.

Benine, R.C., Mariguela, T.C. & Oliveira, C. (2009) New species of Moenkhausia Eigenmann, 1903 (Characiformes: Characidae) with comments on the Moenkhausia oligolepis species complex. Neotropical Ichthyology, 7 (2), 161–168.

Benine, R.C., Melo, B.F., Castro, R.M.C. & Oliveira, C. (2015) Taxonomic revision and molecular phylogeny of Gymnocorymbus Eigenmann, 1908 (Characiformes, Characidae). Zootaxa, 3956 (1), 1–28.

Castro, J.P., Moura, M.O., Moreira-Filho, O., Shibatta, O.A., Santos, M.H., Nogaroto, V., Vicari, M.R., Almeida, M.C. & Artoni, R.F. (2014a) Evidence of incipient speciation in Astyanax scabripinnis species complex (Teleostei: Characidae). Neotropical Ichthyology, 12 (2), 429–438.

Castro, J.P., Moura, M.O., Moreira-Filho, O., Shibatta, O.A., Santos, M.H., Nogaroto, V., Vicari, M.R., Almeida, M.C. & Artoni, R.F. (2014b) Diversity of the Astyanax scabripinnis species complex (Teleostei: Characidae) in the Atlantic Forest, Brazil: species limits and evolutionary inferences. Reviews in Fish Biology and Fisheries, 11.

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

Eigenmann, C.H. (1908) Preliminary description of new genera and species of tetragonopterid characins. Bulletin of the Museum of Comparative Zoology, 52 (6), 91–106.

Eigenmann, C.H. (1917) The American Characidae. Part I. Memoirs of the Museum of Comparative Zoology, 43 (1), 1–102, 16 pls.

Eigenmann, C.H. (1921) The American Characidae. Part 3. Memoirs of the Museum of Comparative Zoology, 43 (3), 209–310, 28 pls.

Eschmeyer, W. (2015) Catalog of Fishes. Electronic publication in “World Wide Web”. (accessed 5 May 2015)

Géry, J. (1977) Characoids of the World. THF publications, Neptune City, NJ, 672pp.

Géry, J. (1992) Description de deux nouvelles espèces proches de Moenkhausia lepidura (Kner) (Poissons, Characiformes, Tetragonopterinae), avec une revue de grupe. Revue Francese Aquariofilie, 19, 69–78.

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. (Ed.), Check List of the Freshwater fishes of South and Central America. Edipucrs, Porto Alegre, pp. 106–169.

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 (4), 327–332.

Mirande, J.M. (2010) Phylogeny of the family Characidae (Teleostei: Characiformes) from characters to taxonomy. Neotropical Ichthyology, 8 (1), 385–568.

Paz, F.P.C., Batista, J.S. & Porto, J.I.R. (2014) DNA barcodes of Rosy Tetras and allied species (Characiformes:Characidae: Hyphessobrycon) from Brazilian Amazon basin. Plos One, 9 (5), 1–8.

Pereira, L.H.G., Hanner, R., Foresti, F. & Oliveira, C. (2013) Can DNA barcoding accurately discriminate megadiverse Neotropical freshwater fish fauna? BMC Genetics, 14, 20.

Sabaj Pérez, M.H. (2014) Standard symbolic codes for institutional resource collections in herpetology and ichthyology. Electronic publication in “World Wide Web”. Available from: (22 September 2014)

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.

Weitzman, S.H. (1962) The osteology of Brycon meeki, a generalized characid fish, with an osteological definition of the family. Stanford Ichthyological Bulletin, 8 (1), 1–77.

Weitzman, S.H. (1974) Osteology and evolutionary relationships of the Sternoptychidae, with a new classification of stomiatoid families. Bulletin of the American Museum of Natural History, 153 (3), 327–478.

Zanata, A.M. & Vari, R.P. (2005) The family Alestidae (Ostariophysi, Characiformes): a phylogenetic analysis of a trans-Atlantic clade. Zoological Journal of the Linnean Society, 145, 1–144.


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