Original description as Apistogramma piauiensis:
ZooBank:F89768FC-5DCC-4937-A413-43409C1E33E3.
- Kullander, Sven. 1980. "A taxonomical study of the genus Apistogramma Regan, with a revision of Brazilian and Peruvian species (Teleostei: Percoidei: Cichlidae)". Bonner Zoologische Monographien. 1-152 (crc00334)
Conservation: Apistogramma piauiense is not evaluated by the international union for the conservation of nature in the iucn red list of threatened species.