Abstract
A new species of Characidium Reinhardt, 1867 endemic to tributaries of the upper rio Paraguaçu in the Chapada Diamantina, Bahia, Brazil, is described. The new species can be distinguished from its congeners except C. bahiense, C. bimaculatum, C. laterale, C. nana, C. nupelia, and C. xavante, by having a conspicuous peduncular blotch in addition to the basicaudal spot on the base of the middle caudal-fin rays. Among other features, the new species differs from C. bahiense, C. laterale, C. nana, C. nupelia, and C. xavante by having a complete lateral line with 32–36 perforated scales (vs. lateral line short, with 9–11 perforated scales), and from C. bimaculatum by the body pigmentation pattern, with secondary bars present (vs. absent), total bars 11–16 (vs. 10–12), peduncular blotch rounded (vs. horizontally elongated), and mature males not having a darker dorsal fin (vs. proximal third of dorsal fin darker in mature males). Characidium bimaculatum, a poorly known species from Northeastern Brazil, is redescribed.
References
Abell, R, Thieme, M.L, Revenga, C, Bryer, M, Kottelat, M, Bogutskaya, N, Coad, B, Mandrak, N, Balderas, S.C, Bussing, W, Stiassny, M.L.J, Skelton, P, Allen, G.R, Unmack, P, Naseka, A, Ng, R, Sindorf, N, Robertson, J, Armijo, E, Higgins, J.V, Heibel, T.J, Wikramanayake, E, Olson, D, López, H.L, Reis, R.E, Lundberg, J.G, Pérez, M.H.S. & Petry, P. (2008) Freshwater ecoregions of the world: A new map of biogeographic units for freshwater biodiversity conservation. Bioscience, 58 (5), 403–414.
http://dx.doi.org/10.1641/B580507Almeida, V.G. (1971) Descrição de uma nova espécie do gênero Characidium (Pisces, Characidae). Papéis Avulsos de Departamento de Zoologia, 25, 111–119.
Buckup, P.A. (1992) Redescription of Characidium fasciatum, type species of the Characidiinae (Teleostei, Characiformes). Copeia, 1992 (4), 1066–1073.
Buckup, P.A. (1993a) Review of the characidiin fishes (Teleostei: Characiformes), with description of four new genera and ten new species. Ichthyological Exploration of Freshwaters, 4 (2), 97–154.
Buckup, P.A. (1993b) Phylogenetic interrelationships and reductive evolution in the neotropical charadidiin fishes. Cladistics, 9 (4), 305–341.
http://dx.doi.org/10.1111/j.1096-0031.1993.tb00227.xBuckup, P.A. & Reis, R.E. (1997) Characidiin Genus Characidium (Teleostei, Characiformes) in Southern Brazil, with Description of Three New Species. Copeia, 1997 (3), 531–548.
http://dx.doi.org/10.2307/1447557Camelier, P. & Zanata, A.M. (2014) Biogeography of freshwater fishes from the Northeastern Mata Atlântica freshwater ecoregion: distribution, endemism, and area relationships. Neotropical Ichthyology, 12 (4), 683–698.
http://dx.doi.org/10.1590/1982-0224-20130228Eschmeyer, W.N, Fricke, R. & van der Laan, R. (2016) Catalog of Fishes: Genera, Species, References. California Academy of Sciences, San Francisco.
Available from: http://researcharchive.calacademy.org/research/ichthyology/catalog/fishcatmain.asp (Accessed 10 April 2016).Fowler, H.W. (1941) A collection of fresh-water fishes obtained in eastern Brazil by Dr. Rodolpho von Ihering. Proceedings of the Academy of Natural Sciences of Philadelphia, 93, 123–199.
Fujita, K. (1990) The Caudal Skeleton of Teleostean Fishes. Tokai University Press, Tokyo, 897 p.
Graça, W.J. da, Pavanelli, C.S. & Buckup, P.A. (2008) Two new species of Characidium (Characiformes: Crenuchidae) from Paraguay and Xingu basins, state of Mato Grosso, Brazil. Copeia, 2008 (2), 326–332.
http://dx.doi.org/10.1643/CI-06-167Gomes, A.L. (1947) A small collection of fishes from Rio Grande do Sul, Brazil. Miscellaneous Publications, Museum of Zoology, University of Michigan, 67, 1–39.
Leitão, R.P. & Buckup, P.A. (2014) A new species of Characidium (Characiformes: Crenuchidae) from coastal basins of Serra do Mar, southeastern Brazil. Copeia, 2014 (1), 14–22.
http://dx.doi.org/10.1643/CI-12-137Lujan, N.K, Agudelo-Zamora, H, Taphorn, D.C, Booth, P.N. & López-Fernández, H. (2013) Description of a new, narrowly endemic South American darter (Characiformes: Crenuchidae) from the central Guiana Shield highlands of Guyana. Copeia, 2013 (3), 454–463.
http://dx.doi.org/10.1643/CI-12-079Melo, M.R.S. & Buckup, P.A. (2002) Characidium stigmosum (Characiformes: Crenuchidae): a new species of characidiin fish from Central Brazil. Copeia, 2002 (4), 988–993.
http://dx.doi.org/10.1643/0045-8511(2002)002[0988:CSCCAN]2.0.CO;2Melo, M.R.S. & Oyakawa, O.T. (2015) A new species of Characidium Reinhardt (Characiformes, Crenuchidae) with a distinctively dimorphic male. Copeia, 103 (2), 281–289.
http://dx.doi.org/10.1643/CI-14-073Melo, M.R.S., Buckup, P.A. & Oyakawa, O.T. (2016) A new species of Characidium Reinhardt, 1867 (Characiformes: Crenuchidae) endemic to the Atlantic Forest in Paraná State, southern Brazil. Neotropical Ichthyology, 14 (3): e160014.
http://dx.doi.org/10.1590/1982-0224-20160014Mendonça, M.B. & Ferreira-Netto, A.L. (2015) New species of Characidium (Characiformes: Crenuchidae) from the Rio Tapajós and Rio Xingu drainages, Pará, Brazil. Zootaxa, 4021 (1), 187–194.
http://dx.doi.org/10.11646/zootaxa.4021.1.9Netto-Ferreira, A.L, Birindelli, J.L.O. & Buckup, P.A. (2013) A new miniature species of Characidium Reinhardt (Ostariophysi: Characiformes: Crenuchidae) from the headwaters of the rio Araguaia, Brazil. Zootaxa, 3664 (3), 361–368.
http://dx.doi.org/10.11646/zootaxa.3664.3.6Rosa, R.S, Menezes, N.A, Britski, H.A, Costa, W.J.M.E. & Groth, F. (2004) Diversidade, padrões de distribuição e conservação dos peixes da Caatinga. In: Leal, I.R, Tabarelli, M. & da Silva, J.M.C. (Eds.), Ecologia e Conservação da Caatinga. Ed. Universitária da UFPE, Recife, pp. 135–181.
Sabaj-Pérez, M.H. (2014) Standard symbolic codes for institutional resource collections in herpetology and ichthyology: an Online Reference. Version 5.0 (22 September 2014). American Society of Ichthyologists and Herpetologists, Washington, DC.
Available from: http://www.asih.org/resources/standard-symbolic-codes-institutional-resource-collections-herpetology-ichthyology.Santos, A.C.A. (2003) Caracterização da Ictiofauna do Alto rio Paraguaçu, com Ênfase nos rios Santo Antônio e São José (Chapada Diamantina, Bahia). Umpublished PhD Dissertation, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 215 pp.
Sarmento-Soares, L.M. & Martins-Pinheiro, R.F. (2009) A fauna de peixes na bacia do rio dos Frades e microbacias vizinhas, extremo sul da Bahia, Brasil. Boletim do Museu de Biologia Mello Leitão, 26, 25–46.
Sarmento-Soares, L.M, Mazzoni, R. & Martins-Pinheiro, R. F. (2009) A fauna de peixes na bacia do Rio Jucuruçu, leste de Minas Gerais e extremo Sul da Bahia. Pan-American Journal of Aquatic Sciences, 4 (2), 193–207.
Sarmento-Soares, L.M., Mazzoni, R. & Martins-Pinheiro, R.F. (2007) A fauna de peixes na bacia do Rio Peruípe, extremo Sul da Bahia. Biota Neotropica, 7, 291–308.
http://dx.doi.org/10.1590/S1676-06032007000300031Silveira, L.G.G. (2008) Revisão taxonômica de Characidium lagosantense Travassos, 1947 (Crenuchidae: Characiformes: Ostariophysi), com descrição de uma nova espécie para o Alto rio Paraná. Unpublished MS Thesis, Universidade Estadual Paulista, São José do Rio Preto, 55 pp.
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 (1), 107–119.
Travassos, H. (1946) Contribuicão ao estudo da família Characidae Gill, 1893. II. Characidium timbuiensis n. sp. (Classe Actinopterygii – Ordem Ostareophysi). Summa Brasiliensis Biologiae, 1 (5), 1–50.
Travassos, H. (1949) Notas ictiológicas. I. Characidium lauroi n. sp. (Actinopterygii, Ostareophysi). Revista Brasileira de Biologia, 9 (1), 87–92.
Zanata, A.M. & Camelier, P. (2014) A new species of Characidium (Characiformes: Crenuchidae) from small coastal drainages in northeastern Brazil, with remarks on the pseudotympanum of some species of the genus. Neotropical Ichthyology, 12 (2), 333–342.
http://dx.doi.org/10.1590/1982-0224-20130168Zanata, A.M. & Camelier, P. (2015) Two new species of Characidium Reinhardt (Characiformes: Crenuchidae) from northeastern Brazilian coastal drainages. Neotropical Ichthyology, 13 (3), 487–498.
http://dx.doi.org/10.1590/1982-0224-20140106Zanata, A.M. & Ohara, W.M. (2015) A new species of Characidium Reinhardt (Ostariophysi: Characiformes: Crenuchidae) from headwaters of rio Pacaás Novos, rio Madeira basin, Rondônia, Brazil. Zootaxa, 4021 (2), 368–376.
http://dx.doi.org/10.11646/zootaxa.4021.2.7.Zanata, A.M, Sarmento-Soares, L.M. & Martins-Pinheiros, R.F. (2015) A new species of Characidium Reinhardt (Ostariophysi: Characiformes: Crenuchidae) from coastal rivers in the extreme south of Bahia, Brazil. Zootaxa, 4040 (3), 371–383.
http://dx.doi.org/10.11646/zootaxa.4040.3.8