Abstract
A new characid fish is described herein from tributaries of the Rio Aricá-Mirim, Rio Cuiabá basin, Chapada dos Guimarães, Mato Grosso State, Brazil. Astyanax pirapuan better conforms to the A. scabripinnis species complex and it can be distinguished from other species of this complex by a combination of characters, including 8–9 gill rakers on the upper limb of first branchial arch, 0–1 tooth on the maxillary, 17 to 21 branched anal-fin rays, 35–37 perforated lateral line scales and two humeral spots.References
Bertaco, V.A. & Lucena, C.A.S. (2006) Two new species of Astyanax (Ostariophysi: Characiformes: Characidae) from eastern Brazil, with a synopsis of the Astyanax scabripinnis species complex. Neotropical Ichthyology, 4(1), 53–60.
Bertaco, V.A. & Lucena, C.A.S. (2010) Redescription of Astyanax obscurus (Hensel, 1870) and A. laticeps (Cope, 1894) (Teleostei: Characidae): two valid freshwater species originally described from rivers of Southern Brazil Neotropical Ichthyology, 8(1), 7–20.
Crim, L.W. & Glebe, B.D. (1990) Reproduction, p. 529–547. In: Methods for fish biology. C. B. Schreck and P. B. Moyle (eds.). American Fisheries Society, Bethesda, MD.
Eigenmann, C.H. (1917) The American Characidae. Memoirs of the Museum of Comparative Zoology, 43, 1–102.
Eigenmann, C.H. (1921) The American Characidae. Memoirs of the Museum of Comparative Zoology, 43, 209–310.
Eschmeyer, W. (2010) Catalog of Fishes. Electronic publication in “World Wide Web”. Available from: http://www.calacademy.org/research/ichthyology/catalog. (access on: Sep, 20, 2010).
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.
Garutti, V. & Britski, H.A. (1997) Descrição de uma espécie nova de Astyanax (Teleostei, Characidae), com mancha umeral horizontalmente ovalada, da bacia do Rio Guaporé, Amazônia. Papéis Avulsos de Zoologia (São Paulo), 40(14), 217–229.
Lima, F.C.T., Malabarba, L.R., Buckup, P.A., Silva, J.F.P., Vari, R.P., Harold, A., Benine, R., Oyakawa, O.T., Pavanelli, C.S., Menezes, N.A., Lucena, C.A.S., Malabarba, M.C. S.L., Lucena, Z.M.S., Reis, R.E., Langeani, F., Cassati, L., Bertaco, V.A., Moreira, C. & Lucinda, P.H.F. (2003) Genera Incertae Sedis in Characidae. In: Reis, R.E., Kullander, S.O. & Ferraris, C. (Ed.), Check List of Freshwater Fishes of South and Central America. Edipucrs, Porto Alegre, pp. 106–169.
Mirande, J.M. (2009) Weighted parsimony phylogeny of the family Characidae (Teleostei: Characiformes). Cladistics, 25, 1–40.
Mirande, J.M. (2010) Phylogeny of the family Characidae (Teleostei: Characiformes): from characters to taxonomy. Neotropical Ichthyology, 8(3), 385–568.
Moreira-Filho, O. & Bertollo, L.A.C. (1991) Astyanax scabripinnis (Pisces, Characidae): a species complex. Revista Brasileira de Genética, 14, 331–357.
Rosen, D.E. (1972) Origin of the characid fish genus Bramocharax and a description of a second, more primitive, species in Guatemala. American Museum Novitates, 500, 1–21.
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.
Weitzman, S.H. & Malabarba, L.R. (1998) Perspectives about the phylogeny and classification of the Characidae (Teleostei: Characiformes). In: Malabarba, L.R., Reis, R.E., Vari, R.P., Lucena, Z.M.S. & Lucena, C.A.S (Eds), Phylogeny and Classification of Neotropical Fishes. Porto Alegre, Edipucrs, pp. 161–170.