Descripción original como Cyprinodon alvarezi:
ZooBank:3A731526-D9A7-410B-8D7B-A36DD828E77D.
- Miller, Robert Rush. 1976. "Four new pupfishes of the genus Cyprinodon from Mexico, with a key to the C. eximius complex". Bulletin of the Southern California Academy of Sciences. 75(2):68-75 (ffm00172)
Conservación: Cyprinodon alvarezi es evaluada por la Unión Internacional para la Conservación de la Naturaleza en la lista roja de especies amenazadas como (EW) Extinto en la naturaleza (2018). Reported extinct in 1994 by Burkhead (2012). I nevertheless was able to see what apparently were the last specimens in March 1996, when the sprigs had been reduced to a few isolated small poodles.