Original description as Amiurus mexicanus:
- Meek, Seth Eugene. 1904. "The fresh-water fishes of Mexico north of the isthmus of Tehuantepec". Field Columbian Museum Publication. 1-252 (ffm00159)
- Amiurus australis Meek, 1904, with type locality at Río Forlón, Forlón, Rio Panuco drainage, Tamaulipas, Mexico. Determiner: Pérez Rodríguez et al., 2023
Conservation: Ictalurus mexicanus is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (VU) vulnerable (1996).