Protomyzon

Protomyzon is a genus of gastromyzontid loaches endemic to Borneo.

Species
There are currently four recognized species in this genus:
 * Protomyzon aphelocheilus Inger & P. K. Chin, 1962
 * Protomyzon borneensis Hora & Jayaram, 1952
 * Protomyzon griswoldi (Hora & Jayaram, 1952)
 * Protomyzon whiteheadi (Vaillant, 1894)