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      Lophiobrycon weitzmani, a new genus and species of glandulocaudine fish (Characiformes: Characidae) from the rio Grande drainage, upper rio Paraná system, southeastern Brazil

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          Abstract

          A new genus and species of glandulocaudine, Lophiobrycon weitzmani, is described based on specimens collected in headwater tributary streams of the rio Grande, upper rio Paraná system, State of Minas Gerais, southeastern Brazil. The inclusion of the new species in the phylogeny of the subfamily Glandulocaudinae proposed by Weitzman & Menezes (1998), reveals a sister group relationship between the new genus and the monophyletic group composed of Glandulocauda and Mimagoniates that currently form the tribe Glandulocaudini. The new species can be readily distinguished from all other species of the tribe by the autapomorphic presence in adult male individuals (with more than 23.9 mm standard length) of an adipose-fin whose base extends for almost the entire distance between the posterior terminus of the base of the dorsal fin and the base of the upper lobe of the caudal fin and averages approximately 25% standard length, along with the presence of globular expansions formed by the lepidotrichia and hypertrophied soft tissue in the middle portions of the first and second pectoral-fin rays. The diagnosis of the tribe Glandulocaudini is modified to accommodate the new genus.

          Translated abstract

          Um novo gênero e espécie de glandulocaudine, Lophiobrycon weitzmani, é descrito com base em exemplares coletados em riachos de cabeceira da drenagem do rio Grande, sistema do alto rio Paraná, Estado de Minas Gerais, sudeste do Brasil. A inclusão desta nova espécie na filogenia da subfamília Glandulocaudinae, proposta por Weitzman & Menezes (1998), revela uma relação de grupos irmãos entre o novo gênero e o grupo monofilético formado por Glandulocauda e Mimagoniates, atualmente compondo a tribo Glandulocaudini. A nova espécie pode ser facilmente distinguida das demais da tribo pela posse autapomórfica, nos machos adultos (com mais de 23,9 mm de comprimento padrão), de uma nadadeira adiposa com a base estendendo-se por praticamente a totalidade da distância entre a terminação posterior da base da nadadeira dorsal e base do lobo caudal superior, equivalendo em média a aproximadamente 25% do comprimento padrão, juntamente com a presença de expansões globulares, formadas por lepidotríquios e tecido mole hipertrofiado, na porção média do primeiro e segundo raios da nadadeira peitoral. A diagnose da tribo Glandulocaudini é modificada para acomodar o novo gênero.

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          Most cited references17

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          Climatologia do Brasil

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            The so-called cheirodontin fishes of Central America with descriptions of two new species (Pisces: Characidae)

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              Climatologia do Brasil

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                Author and article information

                Journal
                ni
                Neotropical Ichthyology
                Neotrop. ichthyol.
                Sociedade Brasileira de Ictiologia (Maringá, PR, Brazil )
                1679-6225
                1982-0224
                September 2003
                : 1
                : 1
                : 11-19
                Affiliations
                [01] Ribeirão Preto SP orgnameUSP orgdiv1FFCLRP orgdiv2Departamento de Biologia Brazil rmcastro@ 123456ffclrp.usp.br
                Article
                S1679-62252003000100002 S1679-6225(03)00100102
                10.1590/S1679-62252003000100002
                01490111-48e7-4c26-b197-921533599b86

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 26 February 2003
                : 08 July 2003
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 20, Pages: 9
                Product

                SciELO Brazil


                Glandulocauda,Mimagoniates,phylogeny,Glandulocaudinae
                Glandulocauda, Mimagoniates, phylogeny, Glandulocaudinae

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