Phylogenetic interrelationships, taxonomy, and reductive evolution in the Neotropical electric fish genus Hypopygus (Teleostei, Ostariophysi, Gymnotiformes) De Santana, Carlos D. Crampton, William G. R. Zoological Journal of the Linnean Society 2011 2011-11-25 163 4 1096 1156 78CL 36693 , Mago-Leccia 1994 [1016,1211,1171,1192] Actinopterygii Rhamphichthyidae Rhamphichthys Animalia Gymnotiformes 59 1155 Chordata genus    Rhamphichthyscf. mamoratus, MCP 44604, 2, 43.4–43.4 (WC01.020195, immature, 43.4 mm; WC02.020195, immature, 43.4 mm);  Brazil, Amazonas, Lago Juruazinho, near confluence of Rio Japuráand Rio Solimões, 03°02.58′S, 064°51.01′W.   Rhamphichthys lineatusCastelnau, MCP44757, 1, 286 mm(WC36.240200, immature);  Brazil, Amazonas, Praia Caborini, confluence of Rio Solimõesand Rio Japurá, 03°09.14′S, 64°47.06′W. MCP 44756 [1150,1338,1209,1231] WC Brazil Rio Tefe -3.3603334 Amazonas 13 -64.698166 Lago Tefe 59 1155 WC01.290594 1 Brazil Rio Solimoes -3.043 Amazonas 13 -64.85017 Rio Japura 59 1155 1 Brazil Rio Japura -3.1523333 Amazonas 13 -64.78433 Rio Solimoes 59 1155 1