Triaenophorus is a genus of flatworms belonging to the family Triaenophoridae.

The species of this genus are found in Europe and Northern America.

Species: Triaenophorus crassus Forel, 1868 Triaenophorus lucii (Müller, 1776) Triaenophorus meridionalis Kuperman, 1968 Triaenophorus nodulosus (Pallas, 1781) Rudolphi, 1793 Triaenophorus robustus Olsson, 1893 Triaenophorus stizostedionis Miller, 1945

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