Original description:
- Miller, Robert Rush. 1956. "A new genus and species of cyprinodontid fish from San Luis Potosi, Mexico, with remarks on the subfamily Cyprinodontinae". Occasional Papers of the Museum of Zoology, University of Michigan. (581):1-17 (ffm00169)
Type species: Cualac tessellatus Miller, 1956 (original designation).
Described species included (1):
valid: 1- Cualac tessellatus Miller, 1956 (valid)