Tridentopsis is a genus of pencil catfishes native to South America.
There are currently three recognized species in this genus:
T. cahuali originates from the Paraguay River basin in Argentina. T. pearsoni inhabits the upper Amazon River basin in Bolivia. T. tocantinsi lives in the Tocantins River basin in Brazil.[1] Tridentopsis species grow to about 2.2 - 2.3 centimetres (.87 - .91 in) SL.