Resumen: Notes on taxonomy, distribution, natural history, conservation and captive maintenance.
ZooBank:7EA07A04-488D-4853-A1C1-EC49B65A595A.
Descripción original como Xiphophorus pygmaeus:
Hubbs, Carl Leavitt & M. Gordon. 1943. "Studies of cyprinodont fishes. XIX. Xiphophorus pygmaeus, new species from Mexico". Copeia. 1943(1):31-33 - (ffm00064)