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A New Genus and Species of a Minute Suckermouth Armored Catfish (Siluriformes: Loricariidae) from the Rio Tocantins Drainage, Central Brazil: The Smallest Known Loricariid Catfish

Nannoplecostomus eleonorae, a new genus and species of a miniature suckermouth armored catfish, is described based on specimens collected from the karst region of São Domingos, upper Rio Tocantins basin, Goiás State, central Brazil. The new genus and species can be diagnosed among loricariids by pre...

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Published in:Copeia 2012-12, Vol.2012 (4), p.637-647
Main Authors: Ribeiro, Alexandre C, Lima, Flávio C. T, Pereira, Edson H. L
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description Nannoplecostomus eleonorae, a new genus and species of a miniature suckermouth armored catfish, is described based on specimens collected from the karst region of São Domingos, upper Rio Tocantins basin, Goiás State, central Brazil. The new genus and species can be diagnosed among loricariids by presenting a unique reductive pattern of lateral dermal plates, with most of the body covered by only three series of plates (viz., dorsal, mid-ventral, and ventral). Based on the available published phylogenetic studies for the family, we provisionally consider Nannoplecostomus eleonorae as being an incertae sedis taxon within Loricariidae. Achieving a maximum standard length of 22.2 mm SL, Nannoplecostomus eleonorae is the smallest known loricariid catfish, and a list of the remaining smallest loricariids is provided. É descrito um novo gênero e espécie de cascudo miniaturizado, Nannoplecostomus eleonorae, baseado em espécimes coletados na região de carste de São Domingos, bacia do alto rio Tocantins, estado de Goiás, Brasil central. O novo gênero e espécie pode ser diagnosticado dos demais loricarídeos por apresentar um padrão de redução das placas dérmicas laterais único, em que a maior parte do corpo é recoberta por apenas três séries de placas (viz., séries dorsal, médio-ventral e ventral). Baseado nos estudos filogenéticos publicados para a família, consideramos Nannoplecostomus eleonorae como sendo um táxon incertae sedis dentro de Loricariidae. Atingindo um comprimento padrão máximo de 22,2 mm CP, Nannoplecostomus eleonorae é o menor loricarídeo conhecido, e uma lista dos demais menores loricarídeos é fornecida.
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T</au><au>Pereira, Edson H. L</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A New Genus and Species of a Minute Suckermouth Armored Catfish (Siluriformes: Loricariidae) from the Rio Tocantins Drainage, Central Brazil: The Smallest Known Loricariid Catfish</atitle><jtitle>Copeia</jtitle><date>2012-12-18</date><risdate>2012</risdate><volume>2012</volume><issue>4</issue><spage>637</spage><epage>647</epage><pages>637-647</pages><issn>0045-8511</issn><issn>2766-1512</issn><eissn>1938-5110</eissn><eissn>2766-1520</eissn><abstract>Nannoplecostomus eleonorae, a new genus and species of a miniature suckermouth armored catfish, is described based on specimens collected from the karst region of São Domingos, upper Rio Tocantins basin, Goiás State, central Brazil. The new genus and species can be diagnosed among loricariids by presenting a unique reductive pattern of lateral dermal plates, with most of the body covered by only three series of plates (viz., dorsal, mid-ventral, and ventral). Based on the available published phylogenetic studies for the family, we provisionally consider Nannoplecostomus eleonorae as being an incertae sedis taxon within Loricariidae. Achieving a maximum standard length of 22.2 mm SL, Nannoplecostomus eleonorae is the smallest known loricariid catfish, and a list of the remaining smallest loricariids is provided. É descrito um novo gênero e espécie de cascudo miniaturizado, Nannoplecostomus eleonorae, baseado em espécimes coletados na região de carste de São Domingos, bacia do alto rio Tocantins, estado de Goiás, Brasil central. O novo gênero e espécie pode ser diagnosticado dos demais loricarídeos por apresentar um padrão de redução das placas dérmicas laterais único, em que a maior parte do corpo é recoberta por apenas três séries de placas (viz., séries dorsal, médio-ventral e ventral). Baseado nos estudos filogenéticos publicados para a família, consideramos Nannoplecostomus eleonorae como sendo um táxon incertae sedis dentro de Loricariidae. Atingindo um comprimento padrão máximo de 22,2 mm CP, Nannoplecostomus eleonorae é o menor loricarídeo conhecido, e uma lista dos demais menores loricarídeos é fornecida.</abstract><cop>810 East 10th Street, P.O. Box 1897, Lawrence, Kansas 66044</cop><pub>The American Society of Ichthyologists and Herpetologists</pub><doi>10.1643/CI-11-137</doi><tpages>11</tpages></addata></record>
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identifier ISSN: 0045-8511
ispartof Copeia, 2012-12, Vol.2012 (4), p.637-647
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source JSTOR Archival Journals and Primary Sources Collection
subjects Biological taxonomies
Catfish
Freshwater
Freshwater fishes
Holotypes
Ichthyology
Loricariidae
New genus
New species
Paratypes
Pectorals
Phylogenetics
Siluriformes
Systematic Biology
Taxonomy
Vertebra
title A New Genus and Species of a Minute Suckermouth Armored Catfish (Siluriformes: Loricariidae) from the Rio Tocantins Drainage, Central Brazil: The Smallest Known Loricariid Catfish
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