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Type: Article
Published: 2017-02-21
Page range: 82–94
Abstract views: 123
PDF downloaded: 2

Two new species of Melanorivulus (Cyprinodontiformes: Cynolebiidae) from Rio Verde drainage, Upper Rio Paraná basin, Brazil

Instituto Pró-Pampa (IPPampa), Laboratório de Ictiologia. Rua Uruguai, 1242, Bairro Centro, CEP 96010-630, Pelotas, Rio Grande do Sul, Brasil
Instituto Pró-Pampa (IPPampa), Laboratório de Ictiologia. Rua Uruguai, 1242, Bairro Centro, CEP 96010-630, Pelotas, Rio Grande do Sul, Brasil
Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Departamento de Ciências Morfofisiológicas, Laboratório de
Pisces killifish Cerrado biome conservation taxonomy Neotropical region

Abstract

Two new species of the genus Melanorivulus are herein described from the middle Rio Verde drainage, upper Rio Paraná basin, Mato Grosso do Sul, Brazil. Both new species are members of the Melanorivulus pictus clade, diagnosed by having ventral process of angulo-articular vestigial and flanks intense greenish blue or greenish golden to purplish blue above anal fin base in males. Melanorivulus nigropunctatus, new species, from wetlands of a small drainage tributary of right side of the Rio Verde, differs from all other congeners by possessing black dots over the head and body in both sexes and pectoral fin orange with a dark grey margin in males. Melanorivulus ofaie, new species, is found in a similar environment, but at the opposite margin of the Rio Verde. It is distinguished by males presenting flank greenish blue to light blue, with seven to nine oblique chevron-like red bars, ventral portion of head whitish with dark brown spots, dorsal fin yellow with two to three transverse broad red oblique stripes and distal region red, anal fin light orangish yellow, basal area light blue with short red bars and distal portion with a dark red margin, and caudal fin yellow or orangish yellow with three to four vertical red bars in the dorsal and middle portions, sometimes with a orange distal margin. Both new species are considered endangered due to the loss and degradation of their habitat.

References

  1. Cavalcanti, R. & Joly, C. (2002) The conservation of the Cerrados. In: Oliveira, P.S. & Marquis, R.J. (Eds.), The Cerrado of Brazil. Ecology and natural history of a neotropical savanna. Columbia University Press, New York, pp. 351–367.

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

    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 (1), 69–82.
    http://dx.doi.org/10.1590/S1679-62252005000100003

    Costa, W.J.E.M. (2007) Rivulus illuminatus, a new Killifish from the Serra dos Caiapós, upper rio Paraná basin, Brazil (Teleostei: Cyprinodontiformes: Rivulidae). Ichthyological Exploration of Freshwaters, 18 (3), 193–198.

    Costa, W.J.E.M. (2008) Rivulus formosensis, a new aplocheiloid Killifish from the upper Corrente River drainage, upper rio Paraná basin, central Brazil. (Cyprinodontiformes: Rivulidae). Ichthyological Exploration of Freshwaters, 19 (1), 85–89.

    Costa, W.J.E.M. (2011) Phylogenetic position and taxonomic status of Anablepsoides, Atlantirivulus, Cynodonichthys, Laimosemion and Melanorivulus (Cyprinodontiformes: Rivulidae). Ichthyological Exploration of Freshwaters, 22 (3), 233–249.

    Costa, W.J.E.M. (2013) A new killifish of the genus Melanorivulus from the upper Paraná river basin, Brazil (Cyprinodontiformes: Rivulidae). Vertebrate Zoology, 63 (3), 277–281.

    Costa, W.J.E.M. (2016) Comparative morphology, phylogenetic relationships, and taxonomic revision of South American killifishes of the Melanorivulus zygonectes species group (Cyprinodontiformes: Rivulidae). Ichthyological Exploration of Freshwaters, 27 (2), 107–152.

    Costa, W.J.E.M., Bragança, P.H.N. & Ottoni, F.P. (2015) A new miniature killifish of the genus Melanorivulus (Cyprinodontiformes: Rivulidae) from the coastal plains of north-eastern Brazil. Vertebrate Zoology, 65 (1), 31–35.

    Hoedeman, J.J. (1958) The frontal scalation pattern in some groups of tooth carps. Bulletin of Aquatic Biology, 1, 23–28.

    Myers, N., Mittermeier, R.A., Mittermeier, C.G., Da Fonseca, G.A.B. & Kent, J. (2000) Biodiversity hotspots for conservation priorities. Nature, 403, 853–858.
    http://dx.doi.org/10.1038/35002501

    Nielsen, D.T.B., Aguiar, P.A.B., Ywamoto, E.V. & Passos, M.A. (2016) Melanorivulus polychromus, a new species of killifish from the rio São José dos Dourados drainage, middle rio Paraná basin, southwestern Brazil, with a redescription of Melanorivulus apiamici (Cyprinodontiformes: Rivulidae). Aqua, 22 (2), 79–88.

    ICMBIO (Instituto Chico Mendes de Conservação da Biodiversidade) (2013) Sumário Executivo do Plano de Ação Nacional para a Con-servação dos Peixes Rivulídeos Ameaçados de Extinção. Brasília. Available from: http://www.icmbio.gov.br/portal/images/stories/ docs-plano-de-acao/pan-rivulideos/sumario-executivo-rivulide-os.pdf (acessed in April 2016)

    IUCN Standards and Petitions Subcommittee (2011) Guidelines for Using the IUCN Red List Categories and Criteria, Version 9.0. Standards and Petitions Subcommittee, 87 pp. Available from: http://www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed in March 2016)

    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.

    Volcan, M.V., Lanés, L.E.K., Gonçalves, Â.C. & Guadagnin, D.L. (2015) Annual fishes (Rivulidae) from Southern Brazil: A broad-scale assessment of their diversity and conservation. In: Berois, N., García, G. & de Sá, R.O. (Org.), Annual Fishes: Life History Strategy, Diversity, and Evolution. CRC Press Taylor & Francis Group, New York, pp. 185–206.
    https://doi.org/10.1201/b19016-14