Considéré comme synonyme junior de Ilyodon furcidens (Jordan & Gilbert, 1882)
- Hubbs, Carl Leavitt & C.L. Turner. 1939. "Studies of the fishes of the order Cyprinodontes. XVI. A revision of the Goodeidae". Miscellaneous Publications, Museum of Zoology, University of Michigan. (42):1-80 (ffm04500)
Décrit initialement sous Ilyodon paraguayense:
- Eigenmann, Carl H.. 1907. "The poeciliid fishes of Rio Grande do Sul and the La Plata Basin". Proceeding of the United States National Museum. 32(1532):425-433 (ffm04529)