thumb|left|150 px|Helminthological investigations: A worm of the family Protomicrocotylidae, a family created by Johnston and Tiegs in 1922Johnston, T. A. & Tiegs, O. W. 1922: New gyrodactyloid trematodes from Australian fishes together with a reclassification of the super-family Gyrodactyloidea. Proceedings of the Linnean Society of New South Wales, 47, 83–131.
