| Citation | Costa, W.J.E.M., 2008, Simpsonichthys longignathus, a new seasonal killifish of the S. flammeus group from the Pacoti River basin, northeastern Brazil (Cyprinodontiformes: Rivulidae).. Ichthyol. Explor. Freshwat. 19(2):155-159. |
| Ref. | Costa, W.J.E.M., 2008 |
| Page | 156;fig.1-2 |
| Named Used as Valid | Simpsonichthys longignatus |
| Comment | |
| Locality | Seasonal swamp in the Pacoti River floodplains, road CE-040, about 25 km of Fortaleza, Município de Aquiraz, Estado do Ceará, Brazil. |
| Distribution | Known only from its type locality in Brazil. |
| Quote | . |