Papers/Abstracts

Austrolebias accorsii, a new annual fish (Cyprinodontiformes: Rivulidae: Cynolebiatinae) from the upper río Grande basin, Amazon basin, Bolivia

Dalton Tavares Bressane Nielsen and Didier Pillet

aqua International Journal of Ichthyology,  pp. 172-179, Volume 21 issue 4, 15 October 2015

Abstract

Austrolebias accorsii new species is described from Bolivia, departamento de Santa Cruz, Rio Grande, upper Mamoré basin. This is the first record of the genus Austrolebias at the Amazon basin. Austrolebias accorsii new species is distinguished from other members of the Austrolebias bellottii species group by the following combination of characters: absence of dots or spots on body and fins (vs. presence), absence of bars on body (vs. presence), anal-fin origin between neural spines (13th-14th vs. 5th-11th) in males. Austrolebias accorsii females differ from females of other species of the Austrolebias bellottii species group by the combination of a higher number of anal-fin rays (31-32 vs. 23-30), colour pattern of the sides of body light yellowish brown, without bars; usually 1-3 black spots on anterocentral portion of flanks, surrounded by metallic green spots, black spots of random size and quantity on the posterior portion of the body to the caudal peduncle (vs. with bars, one to sixteen black spots on anterocentral portion of flanks without metallic green spots, absent black spots in peduncle caudal)..

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REFERENCES

COSTA, W. J. E. M. 1995. Pearl killifishes: The Cynolebiatinae. Systematics and Biogeography of a Neotropical annual fish subfamily (Cyprinodontiformes: Rivulidae). TFH Publications, Inc., Neptune City, 128p.

COSTA,W. J. E. M. 1998. Rediscovery and rediscription of Cynolebias carvalhoi (Cyprinodontiformes: Rivulidae). Ichthyological Exploration of Freshwaters 9: 305-310.

COSTA,W. J. E. M. 2006.The South American annual killifish genus Austrolebias (Teleostei: Cyprinodontiformes: Rivulidae): phylogenetic relationships, descriptive morphology and taxonomic revision. Zootaxa 1213:1-162.

COSTA, W. J. E. M. 2007. Taxonomic revision of the seasonal South American killifish genus Simpsonichthys (Teleostei: Cyprinodontiformes: Aplocheiloidei: Rivulidae).

Zootaxa 1669: 1-134. COSTA, W. J. E. M. 2008. Catalog of aplocheiloid killifishes of the world. Reproarte, Rio de Janeiro, 127 pp.

HOEDEMAN, J. J. 1958.The frontal scalation pattern in some groups of tooth carps. Bulletin of Aquatic Biology 1: 23-28.

IRIONDO, M. 1993. Geomorphology and late Quaternary of the Chaco (South America). Geomorphology 7: 289-303.

MONTAÑA, C. G., SCHALK, C. M. & TAPHORN, D. C. 2012. First record of Van den Berg’s Pearlfish, Austrolebias vandenbergi Huber, 1995 (Cyprinodontiformes: Rivulidae) in Bolivia with comments on its diet and reproductive biology. Check List 8 (3): 589-591.

OSINGA, K. 2006. Nuevo registro para Bolivia de Austrolebias monstrosus Huber, 1995 (Rivulidae). Kemppffiana 2 (1): 60-62.

SAGAJ-PÉREZ, M. H. 2010. Standard symbolic codes for institutional resource collections in herpetology and ichthyology: an Online Reference. Verson 1.5 (4 Oct 2010). Electronically accessible at http://www.asih.org/, American Society of Ichthyologists and Herpetologists, Washington, DC.

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.

WILKINSON, M. J., MARSHALL, L. G. & LUNDBERG, J. G. River behavior on megafans and potential influences on diversification and distribution of aquatic organisms. Journal of South American Earth Sciences 21: 151-172.

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Spectrolebias bellidoi, a new annual fish (Cyprinodontiformes: Rivulidae: Cynolebiatinae) from the upper Río Grande basin, Amazon basin, Bolivia

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