| Citation | Costa, W.J.E.M., 2010, Simpsonichthys harmonicus, a new seasonal killifish from the São Francisco River basin, northeastern Brazil (Cyprinodontiformes: Rivulidae).. Ichthyol. Explor. Freshwat. 21(1):73-78. |
| Ref. | Costa, W.J.E.M., 2010 |
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| Named Used as Valid | Simpsonichthys harmonicus |
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| Locality | |
| Distribution | São Francisco River basin, Brazil |
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