Original description as Acara flavilabris:
- Cope, Edward D. 1871. "Contribution to the ichthyology of the Marañon". Proceedings of the American Philosophical Society. v. 11; pp. 559-570 (crc00071)
Conservation: Laetacara flavilabris is not evaluated by the international union for the conservation of nature in the iucn red list of threatened species.