Considered a synonym of Chuco intermedium (Günther, 1862)
- Regan, Charles Tate. 1905. "A revision of the fishes of the American cichlid genus Cichlosoma and of the allied genera". Annals and Magazine of Natural History. [Series 7]16:60-77:225-243:316-340:433-445 (crc00042)
Original description as Acara rectangularis:
ZooBank:0B6A7922-BF66-49D8-866A-7D20DBCB72D4.
- Steindachner, Franz. 1864. "Beiträge zur Kenntniss der Chromiden Mejico's und Central-Amerika's". Denkschriften der Mathematisch-Naturwissenschaftlichen Classe der Kaiserlichen Akademie der Wissenschaften in Wien. 23(2):57-74 (crc00248)