Erstbeschreibung als Heros istlanus:
ZooBank:E08063C1-C66A-4ACC-A0A2-6BBFF61750AC.
- Jordan, David Starr & J.O. Snyder. 1899. "Notes on a collection of fishes from the rivers of Mexico, with description of twenty new species". Bulletin of the U.S. Fish Commission. 19:115-147 (ffm00041)
Synonyme (2):
- Heros mento Vaillant & Pellegrin, 1902, mit dem Typusfundort von Río Negro, southern Mexico. Identifiziert von: Taylor & Miller, 1980
- Cichlasoma (Parapetenia) leonhard-schultzei Ahl, 1935, mit dem Typusfundort von Tlapa, Guerrero, Mexico. Identifiziert von: Kullander, 2003
- Cichlasoma istlana fusca de Buen, 1946, mit dem Typusfundort von Río Huámito, La Huacana, Mexico. Identifiziert von: Kullander, 2003
Artenschutz: Amphilophus istlanus wurde durch die Internationale Union für die Erhaltung der Natur (IUZN) in der Roten Liste bedrohter Arten bewertet als (LC) nicht gefährdet (2018). A. istlanus faces multiple threats from urban and industrial pollution, habitat degradation, water extraction, hydropower, dam construction, potential overfishing, aquarium trade extraction, and foreign species invasion. However, this species is widespread and occurs within many protected areas of Mexico, and it is not thought that there is a global population decline (Daniels, 2019).
In the Amacuzac River, Balsas drainage, I witnessed A. istlanus sharp population decline in the late 1980s after the introduction of the convict cichlid, Amatitlania nigrofasciata, which quickly colonized the river. Trujillo-Jiménez (1998) found that A. nigrofasciata has a wider but partially overlapping diet with the more specialized A. istlanus, but she rules out that diet alone has displaced the native species.