Tridentopsis is a genus of pencil catfishes native to South America. Species There are currently three recognized species in this genus: Tridentopsis cahuali Azpelicueta, 1990 Tridentopsis pearsoni Myers, 1925 Tridentopsis tocantinsi La Monte, 1939 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. Tridentopsis species grow to about 2.2–2.3 centimetres (.87–.91 in) SL. References Trichomycteridae Fish of South America Fish of the Amazon basin Fish of Argentina Fish of Brazil Fish of Bolivia Taxa named by George S. Myers Catfish genera Freshwater fish genera