Papers/Abstracts

Five new species of the aplocheiloid killifish genus Rivulus, subgenus Melanorivulus, from the middle Araguaia River basin, central Brazil (Teleostei: Cyprinodontiformes: Rivulidae)

Wilson J. E. M. Costa

aqua, International Journal of Ichthyology, pp. 55-68, Volume 13, Issue 2 – 08 November 2007

Abstract
Five new species of the genus Rivulus, subgenus Melanorivulus, are described from the middle Araguaia River basin: R. salmonicaudus n. sp., from streams and swamps directly associated with the main Araguaia River channel; R. rubromarginatus n. sp., from the Peixe River drainage; R. crixas new species, from the Crixás Açu River drainage; R. javahe n. sp., from the Verde River and Crixás Açu River drainages and, R. karaja n. sp., from the Formoso River drainage. All new species are members of the clade referred to here as the R. zygonectes species group. This group is diagnosed by the presence of a diffuse dark grey stripe between the postorbital region and caudal-fin base, in which each included species is diagnosed by the unique colour patterns on the caudal fin in males.

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REFERENCES

COSTA, W. J. E. M. 1989. Descrição de cinco novas espécies de Rivulus das bacias dos rios Paraná e São Francisco (Cyprinodontiformes, Rivulidae). Revista Brasileira de Zoologia 6: 523-533.

COSTA,W. J. E. M. 1995a. Revision of the Rivulus punctatus species-complex (Cyprinodontiformes: Rivulidae). Ichthyological Exploration of Freshwaters 3: 207-226.

COSTA, W. J. E. M. 1995b. Pearl killifishes – the Cynolebiatinae: systematics and biogeography of the neotropical annual fish subfamily. TFH, Neptune City, 128 pp.

COSTA, W. J. E. M. 1998. Phylogeny and classification of Rivulidae revisited: evolution of annualism and miniaturization in rivulid fishes (Cyprinodontiformes: Aplocheiloidei). Journal of Comparative Biology 3: 33-92.

COSTA,W. J. E.M. 2001.The neotropical annual fish genus Cynolebias (Cyprinodontiformes: Rivulidae): phylogenetic relationships, taxonomic revision and biogeography. Ichthyological Exploration of Freshwaters 12: 333-383.

COSTA,W. J. E.M. 2003. A new species of the genus Rivulus Poey, 1860 from the Parnaíba river basin, northeastern Brazil (Teleostei, Cyprinodontiformes, Rivulidae). Boletim do Museu Nacional, Zoologia 511: 1-7.

COSTA, W. J. E. M. 2005. Seven new species of the killifish genus Rivulus (Cyprinodontiformes: Rivulidae) from the Paraná, Paraguay and upper Araguaia river basins, central Brazil. Neotropical Ichthyology 3: 69-82.

COSTA,W. J. E. M. 2006a. Relationships and taxonomy of the killifish genus Rivulus (Cyprinodontiformes: Aplocheiloidei: Rivulidae) from the Brazilian Amazonas river basin, with notes on historical ecology. aqua Journal of Ichthyology and Aquatic Biology 11: 133-175.

COSTA,W. J. E.M. 2006b. Rivulus kayapo n. sp. (Teleostei: Cyprinodontiformes: Rivulidae): a new killifish from the serra dos Caiapós, upper rio Araguaia basin, Brazil. Zootaxa 1368: 49-56.

HOEDEMAN, J. J. 1958. The frontal scalation pattern in some groups of toothcarps (Pisces, Cyprinodontiformes). Bulletin of Aquatic Biology 1: 23-28.

HRBEK, T. & LARSON, A. 1999. The diapause in the killifish family Rivulidae (Atherinomorpha, Cyprinodontiformes): a molecular phylogenetic and biogeographic perspective. Evolution 53: 1200-1216.

MURPHY, W. J., THOMERSON, J. E. & COLLIER, G. E. 1999. Phylogeny of the neotropical killifish family Rivulidae (Cyprinodontiformes, Aplocheiloidei) inferred from mitochondrial DNA sequences. Molecular and Phylogenetic Evolution 13: 289-301.

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: 107-109.

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