Papers/Abstracts

Rivulus paracatuensis n. sp. (Cyprinodontiformes: Rivulidae):a new rivuline species from the Rio São Francisco basin, Brazil

Wilson J. E. M. Costa

aqua, International Journal of Ichthyology, pp. 39-43, Volume 7, Issue 1 – May 2003

Abstract

Rivulus paracatuensis n. sp. is described from a small stream in the Rio Paracatú floodplains, Rio São Francisco basin, Minas Gerais, Brazil. It was previously misidentified as R. decoratus, the only other species of the genus occurring in the São Francisco basin, but described from Ibiraba, Bahia, which is about 1,000 km north of the Rio Paracatú. The new species is easily distinguished from R. decoratus by having more dorsal, caudal and pectoral fin rays, more vertebrae, more scales in the longitudinal series and more scale rows around the caudal peduncle, a wider basihyal, and a distinct male colour pattern.

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REFERENCES

Britski, H. A., Y. Sato & A. B. S. Rosa. 1988. Manual de identificação de peixes da região de Três Marias (com chaves de identificação para os peixes da bacia do São Francisco) (3ª edição). Ministério da Irrigação & CODEVASF, Brasília, 115 pp.

Costa, W. J. E. M. 1995a. Revision of the Rivulus punctatus species-complex (Cyprinodontiformes: Rivulidae). Ichthyological Exploration of Freshwaters, 6 (3): 207-226.

Costa, W. J. E. M. 1995b. Pearl killifishes, the Cynolebiatinae: systematics and biogeography of a neotropical annual fish subfamily (Cyprinodontiformes: Rivulidae). TFH, Neptune City, NJ, USA, 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 (1): 33-92.

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 (3): 523-534.

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 (4): 333-383.

Costa, W. J. E. M. 2003. The Simpsonichthys flavicaudatus species group (Cyprinodontiformes: Rivulidae: Cynolebiatinae): phylogenetic relationships, taxonomic revision and biogeography. Ichthyological Exploration of Freshwaters, 14 (1): 31-60.

Hoedeman, J. J. 1958. Rivulid fishes of the Antilles. Studies on the Fauna of Curaçao and other Caribbean Islands, 32: 112-127.

Taylor, W. R. & G. C. Van Dyke. 1985. Revised procedures for staining and clearing small fishes and other vertebrates for bone and cartilage study. Cybium, 9: 107-109.

Travassos, H. 1960. Catálogo dos peixes do vale do rio São Francisco. Boletim da Sociedade Cearense de Agronomia, 1: 1-66. 

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