Original description as Dionda mandibularis:
- Contreras-Balderas, Salvador & J. Verduzco-Martínez. 1977. "Dionda mandibularis, a new cyprinid fish endemic to the Upper Rio Verde, San Luis Potosi, Mexico, with comments on related species". Transactions of the San Diego Society of Natural History. v. 18(n. 16), pp. 259-266 (ffm00126)
Conservation: Tampichthys mandibularis is not evaluated by the international union for the conservation of nature in the iucn red list of threatened species.