Tepehuan Shiner

Eye diameter larger than snout length. Breast naked. Mouth very oblique. Tuberculation heavy especially on central dorsum of pectoral fins of breeding males, on chin, and spineless on lips. Mature breeding males with bronze underparts including fins. Anal and paired fins with white borders. Body dark, including venter, with large, sparse melanophores, most noticeable in mature males. Other sexes with lateral band as wide or wider than eye, especially around midsides in females (Ref. 40526).

The Tepehuan shiner (Cyprinella alvarezdelvillari) is a species of cyprinid fish endemic to Mexico. It was described as a new species from a stream in the headwaters of Nazas River in Arroyo del Péñon Blanco, upstream of Peñón Blanco, Durango. The specific name honors Dr. José Alvarez del Villar, the "founder of modern Mexican ichthyology".

The Tepehuan shiner is a small species that can grow up to 4.4 cm (1.7 in) standard length, but is usually smaller, less than 3.6 cm (1.4 in) SL. It is usually found in flowing water warmer than 29 °C (84 °F).