Original description as Xenodexia ctenolepis:
- Hubbs, Carl Leavitt. 1950. "Studies of cyprinodont Fishes. XX. A new subfamily from Guatemala, with ctenoid scales and a unilateral pectoral clasper". Miscellaneous Publications, Museum of Zoology, University of Michigan. (78):1-28 (ffm00046) (abstract)
Conservation: Xenodexia ctenolepis is evaluated by the international union for the conservation of nature in the iucn red list of threatened species as (DD) data deficient (2018). The aquatic habitats in the area where Xenodexia ctenolepis inhabits remain to our day in a good state of conservation.