Simpsonichthys de Carvalho

Costa, Wilson J. E. M., 2006, Descriptive morphology and phylogenetic relationships among species of the Neotropical annual killifish genera Nematolebias and Simpsonichthys (Cyprinodontiformes: Aplocheiloidei: Rivulidae), Neotropical Ichthyology 4 (1), pp. 1-26 : 16

Simpsonichthys de Carvalho

Simpsonichthys de Carvalho, 1959: 2 (type species Simpsonichthys boitonei de Carvalho , by original designation).

Diagnosis. Differs from other cynolebiatins by having the following unambiguous synapomorphies: small pointed process on the dorsal portion of the palatine (vs. process absent), rays on the tip of the dorsal and anal fins unbranched in males (vs. branched), and E-scales overlapped (vs. not overlapped).

Etymology. From the Greek xenos (strange), oura (tail) and lebias (small fish, and a name commonly used to compose generic names of cyprinodontiform fishes), referring to the unique morphology of the caudal fin. Gender masculine.