10730 Gasteropelecus levis (Eigenmann, 1909) Gasteropelecidae Freshwater hatchetfishes Characiformes Teleostei Silver hatchetfish South America: lower Amazon River basin in Brazil. AMNH 21941 Gasteropelecus levis AMNH 21942 Gasteropelecus levis AMNH 21943 Gasteropelecus levis AMNH 18204 1913 Gasteropelecus levis AMNH 5079 1914 Gasteropelecus levis AMNH 28506 1939 Gasteropelecus levis GCRL 5243 1959 Gasteropelecus levis