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Published: 2020-07-28

A new species of Mastiglanis Bockmann 1994 (Siluriformes: Heptapteridae) from the Amazon River basin, Peru

Departamento de Ictiología, Museo de Historia Natural, Universidad Nacional Mayor de San Marcos, ​Av. Arenales 1256, Jesús María, Lima, Perú. Departamento de Zoologia, Universidade Federal do Rio Grande do Sul, Programa de Pós-Graduação em Biologia Animal Av. Bento Gonçalves, 9500, Bloco IV, Prédio 43433, Campus do Vale, Bairro Agronomia, Porto Alegre, RS, Brasil.
Departamento de Ictiología, Museo de Historia Natural, Universidad Nacional Mayor de San Marcos, ​Av. Arenales 1256, Jesús María, Lima, Perú.
small catfish freshwater morphology taxonomy Pisces


Mastiglanis is a genus of heptapterid catfish represented by two valid species. These freshwater species are widely distributed along the Amazon, Orinoco, and Maroni River basins. However, a taxonomic review of specimens collected in the Putumayo and Nanay rivers, Amazon River basin in Peru revealed a new species of Mastiglanis. A morphological analysis was completed for morphometric (36 measurements) and meristic (20 counts) data. Osteological counts and descriptions were made from clear and stained specimens and x-rays images. The new species of Mastiglanis differs from M. asopos and M. durantoni by having a long pelvic fin, short snout, eight branched anal-fin rays, and a higher number of vertebrae and gill rakers. The distribution of the new species is restricted to the upper Amazon River basin.


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How to Cite

FAUSTINO-FUSTER, D. R., & ORTEGA, H. (2020). A new species of <em>Mastiglanis</em> Bockmann 1994 (Siluriformes: Heptapteridae) from the Amazon River basin, Peru. Zootaxa, 4820(2), 323–336.