Typová lokalita
Seasonal pool close to road BR-349, ca. 12 kilometers of the left bank of São Francisco River, 13°15'42"S, 43°31'28"W, Município de Bom Jesus da Lapa, Estado de Bahia, Brazil.
Původní popis
Costa, W. J. E. M. 2010. Simpsonichthys harmonicus, a new seasonal killifish from the Sao Francisco River basin, northeastern Brazil (Cyprinodontiformes: Rivulidae). Ichthyological Exploration of Freshwaters, 21 (1): 73-78.
Použitá literatura
Fricke, R., Eschmeyer, W. N. & Van der Laan, R. (eds). 2024. Eschmeyer's catalog of fishes: Genera, species, references. World Wide Web.