Bryconamericus Bryconamericus lethostigmus Bryconamericus indefessus Thayer Expedition List of fishes in the Magdalena River Eretmobrycon Carlastyanax Knodus Pantanos de Villa Wildlife Refuge Bryconops gracilis Tetra Characidae IUCN Red List data deficient species (Chordata) Ectrepopterus List of least concern fishes Hermann von Ihering List of data deficient fishes Lake Maracaibo List of vulnerable fishes IUCN Red List vulnerable species (Animalia)