Hisonotus pachysarkos[1] is a species of catfish in the family Loricariidae.

It is a freshwater species endemic to Brazil, where it occurs in the Ivaí River basin in the upper Paraná River system.

[2] It reaches 4.15 cm (1.6 inches) SL and was described in 2016 by Cláudio Henrique Zawadzki and Weferson Júnio da Graça of State University of Maringá and Fábio F. Roxo of São Paulo State University.

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