What is "calydiscoides"

Calydiscoides is a genus of monopisthocotylean Monogenean, included in the family Diplectanidae.

The genus currently includes 16 species, which are all parasitic on the gills of marine fish of the family Lethrinidae and Nemipteridae. All species are from the Indo-Pacific Ocean. The type-species of the genus is Calydiscoides australis Young, 1969.