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Issue: Vol. 4276 No. 2: 12 Jun. 2017
Type: Article
Published: 2017-06-11
DOI: 10.11646/zootaxa.4276.2.5
Page range: 233–244
Abstract views: 45
PDF downloaded: 1

Microlepidogaster negomata, a new hypoptopomatine catfish (Loricariidae: Hypoptopomatinae) from Rio São Francisco basin, southeastern Brazil

IFPR—Instituto Federal do Paraná, Campus Londrina, Rua João XXIII, 600, 86060-370, Londrina, PR, Brazil. MZUEL—Museu de Zoologia da Universidade Estadual de Londrina, Rod. Celso Garcia Cid, PR 445, Km 380, Campus Universitário, 86057-970, Londrina, PR, Brazil.
UNESP—Universidade Estadual Paulista, Departamento de Zoologia e Botânica, Laboratório de Ictiologia, Instituto de Biociências, Letras e Ciências Exatas, Rua Cristóvão Colombo, 2265, 15054-000, São José do Rio Preto, SP, Brazil.
UNESP—Universidade Estadual Paulista, Departamento de Zoologia e Botânica, Laboratório de Ictiologia, Instituto de Biociências, Letras e Ciências Exatas, Rua Cristóvão Colombo, 2265, 15054-000, São José do Rio Preto, SP, Brazil.
UNESP—Universidade Estadual Paulista, Departamento de Zoologia e Botânica, Laboratório de Ictiologia, Instituto de Biociências, Letras e Ciências Exatas, Rua Cristóvão Colombo, 2265, 15054-000, São José do Rio Preto, SP, Brazil.
Pisces Biodiversity Cascudinhos Freshwater fish Neotropical Taxonomy Teleostei

Abstract

The number of species of Microlepidogaster recently increased considerably, the genus presently comprises six species distributed in the Paraná, São Francisco, and Jequitinhonha river basins. A new species of Microlepidogaster is herein described from the upper Rio São Francisco basin, which can be distinguished from all congeners by having two exclusive features within the genus: skin over swimbladder opening with two to five reduced unperforated platelets, and ventral laminar expansion of coracoid enclosing completely or almost completely the arrector fossa of the pectoral girdle. In addition, other features to recognize this species are: snout covered by many small plates bearing slender pointed odontodes; presence of iris operculum; exposure of pectoral girdle restricted to the lateral portion; presence of pectoral axillary slit only in juveniles; anterior portion of compound supraneural plus first dorsal-fin proximal radial contacting the neural spine of the eighth or ninth vertebra; first anal-fin pterygiophore covered only by skin; and uninterrupted, long median and mid-dorsal series of lateral plates.

 

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