Diplasiocotyle is a genus which belongs to the family Microcotylidae and class Monogenea.

As all Monogenea, species of Microcotylidae are ectoparasites that affect their host by attaching themselves as larvae on the gills of the fish and grow into adult stage.

This larval stage is called oncomiracidium, and is characterized as free swimming and ciliated.

[1] Members of the genus Diplasiocotyle are characterised by a conspicuous haptor, a midventral genital atrium armed with small hooks.

This genus differs from Microcotyle by having clamps of two widely different sizes (the majority are extremely large) and by the structure of clamps.