Taxa named by Francesco Saverio Monticelli

The Diplectanidae are a family of monopisthocotylean monogeneans. They are all parasitic on the gills of fish (marine or freshwater). Diplectanids are small animals, generally around 1 mm in length. As parasites, they can be extremely numerous, up to several thousand on an individual fish.

Didymozoidae is a family of parasitic flatworms (class Trematoda) within the order Plagiorchiida. The group comprises endoparasitic flukes that primarily infect the tissues of marine teleost fishes.

Acanthocotylidae is a family of parasitic flatworms in the class monogenea, a group of mostly external fish parasites.

Tetraonchidae is a family of flatworms belonging to the order Dactylogyridea.