Lamellodiscus is a genus of monopisthocotylean Monogeneans, belonging in the family Diplectanidae; all species of Lamellodiscus are small worms, parasitic on the gills of teleost fish. The type-species of the genus is Lamellodiscus typicus Johnston & Tiegs, 1922, a parasite of a sparid fish caught in Moreton Bay, Queensland, Australia.