Costa, W.J.E.M. (2008): Simpsonichthys longignatus, a new seasonal killifish of the S. flammeus group from the Pacoti River basin, northeastern Brazil (Cyprinodontiformes: Rivulidae).
Simpsonichthys longignatus Costa, 2008
Ichthyological Exploration of Freshwaters, 19 (2): 155-159.