Two new species of Heptapterus (Siluriformes: Heptapteridae) from the Uruguay River basin,Brazil |
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| Authors: | Dario R Faustino-Fuster Flávio A Bockmann Luiz R Malabarba |
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| Institution: | 1. Departamento de Zoologia, Universidade Federal do Rio Grande do Sul, Programa de Pós-Graduação em Biologia Animal, Porto Alegre, Brazil;2. Departamento de Biologia, Universidade de São Paulo, FFCLRP, Laboratório de Ictiologia de Ribeirão Preto, Ribeirão Preto, Brazil |
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| Abstract: | As part of an ongoing taxonomic revision of the genus Heptapterus from the Laguna dos Patos and Uruguay River drainages and Atlantic coastal streams of southern Brazil and Uruguay, two new species closely related to Heptapterus mustelinus were identified. Both species are endemic to small tributaries of the Uruguay River. The two new species are distinguished from each other and from other species of Heptapterus by arrangement of cephalic and trunk laterosensory systems, number of vertebrae and number of dorsal, pectoral and anal-fin rays. Phylogenetic analyses of mitochondrial DNA (coI and cytb) sequence data further supports distinctiveness of the two new species. |
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| Keywords: | catfish endemism Heptapterus mustelinus taxonomy Uruguay River |
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