first record from Argentina:
Gymnogeophagus lipokarenos Malabarba, Malabarba & Reis, 2015

published in:
Casciotta, J., A. Almirón, Š. Říčanová, K. Dragová, L. Piálek, F. Alonso & O. Říčan (2017):
First record of Gymnogeophagus lipokarenos Malabarba, Malabarba & Reis, 2015 (Teleostei: Cichliformes) from Argentina.
Ichthyological Contributions of PecesCriollos 54: 1-5

abstract (from publication):
Gymnogeophagus lipokarenos is registered for the first time from Argentina in the Province of Misiones. The species was originally described as endemic to the Upper Uruguay freshwater ecoregion in Brazil. Our findings extend its distribution into the Lower Uruguay ecoregion throughout the province of Misiones.