Spectrolebias bellidoi, 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. 180-187, Volume 21 issue 4, 15 October 2015


Spectrolebias bellidoi n. sp. is described from a temporary pool from the upper Río Grande, Río Mamoré basin, Departamento Santa Cruz, Bolivia. The new species is distinguished from all congeners by the unique shape of the female’s anal fin, which is composed of two parts, a rounded anterior area, and a posterior portion (from the 14th-15th rays onwards), gradually decreasing in size (vs. entire anal fin with a rounded outline) and a higher number of analfin rays (30 vs. 21-28), in females. It can be additionally distinguished from all congeners, with the exception of S. reticulatus and S. pilleti, by the position of the dorsal fin, which has its origin anterior to the origin of the anal fin in

PDF (31 KB)


AMATO, L. H. 1986. Seis especies nuevas del gênero Cynolebias Steindachner, 1876, de Uruguay y Paraguay (Cyprinodontiformes, Rivulidae). Comunicaciones Zoologicas del Museo de Historia Natural de Montevideo 11 (162): 1 -27.

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., SARMIENTO, J. & BARRERA, S. 1996. A new species of the annual fish genus Pterolebias (Cyprinodontiformes: Rivulidae) from the Rio Mamoré basin, Bolivian Amazon. Ichthyological Exploration of Freshwaters 7: 91-95.

COSTA, W. J. E. M. 1998. Revision of the Neotropical annual fish genus Plesiolebias (Cyprinodontiformes: Rivulidae). Ichthyological Exploration of Freshwaters 8: 313-334.

COSTA, W. J. E. M. 2006. Descriptive morphology and phylogenetic relationship among species of the Neotropical annual killifish genera Nematolebias and Simpsonichthys (Cyprinodontiformes: Aplocheiloidei: Rivulidae). Neotropical Ichthyology 4: 1-26.

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. 2010. Historical biogeography of cynolebiasine annual killifishes inferred from dispersalvicariance analysis. Journal of Biogeography 37: 1995-2004.

COSTA, W. J. E. M., BARRERA, S. & SARMIENTO, J. 1997. Simpsonichthys filamentosus, une nouvelle espèce des Llanuras Benianas, bassin du río Mamoré, Bolivia. Revue Française d’Aquariologie 24: 83-86.

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

KULLMANN, H. & KLEMME, B. 2007. Female mating preference for own males on species and population level in Chromaphyosemion killifishes (Cyprinodontiformes, Nothobranchiidae). Zoology 110: 377-386.

NIELSEN, D. T. B. 2008. Simpsonichthys e Nematolebias. Cabral Editora e Livraria Universitária, Taubaté, 235pp.

NIELSEN, D. T. B. 2013a. Spectrolebias brousseaui (Cyprinodontiformes: Rivulidae: Cynolebiatinae), a new annual fish from the upper río Mamoré basin, Bolivia. Neotropical Ichthyology 11 (1): 81-84.

NIELSEN, D. T. B. 2013b. Spectrolebias pilleti, a new annual killifish (Cyprinodontiformes: Rivulidae: Cynolebiatinae) from the upper río Mamoré basin, Bolivia. aqua, International Journal of Ichthyology 19 (3): 115-122.

SABAJ-PÉREZ, M. H. 2010. Standard symbolic codes for institutional resource collections in herpetology and ichthyology: an Online Reference. Version 1.5 (4 Oct 2010). Electronically accessible at, 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.

Previous post

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

Next post

The Goldiei group of rainbowfishes (Melanotaeniidae) from the Birds Neck Region of New Guinea (Papua and West Papua Provinces, Indonesia) with descriptions of five new species and recognition of Melanotaenia dumasi Weber

The Author