Lithoglyphus naticoides, the gravel snail, is a species of small or minute freshwater snail with an operculum, an aquatic gastropod mollusk in the family Lithoglyphidae.
Arhythmacanthidae is a family of parasitic worms from the order Echinorhynchida.
Opisthorchiidae is a family of digenean trematodes. Opisthorchiidae have cosmopolitan distribution.
Caligus is a genus of sea lice in the family Caligidae. The species are parasites of marine fishes and could be vectors of viruses. As of 2017, the World Register of Marine Species includes the following species:
Plagioporus skrjabini is a species of a trematode in the family Opecoelidae.
Nicolla skrjabini is a species of trematodes in the family Opecoelidae.
Apocreadiidae is a family of parasitic worms in the class Trematoda.
Opecoelidae is a family of trematodes. It is the largest digenean family with over 90 genera and nearly 900 species, almost solely found in marine and freshwater teleost fishes. It was considered by Bray et al. to belong in the superfamily Opecoeloidea Ozaki, 1925 or the Brachycladioidea Odhner, 1905.
The Capsalidae is a family of monopisthocotylean monogeneans, which includes about 200 species.
Neolebouria is a genus of trematodes in the family Opecoelidae.
Opegaster is a genus of trematodes in the family Opecoelidae.
Philophthalmidae is a family of trematodes in the order Plagiorchiida.
Strigeidae is a family of trematodes in the order Diplostomida.
Cryptogonimidae is a family of trematodes belonging to the order Plagiorchiida.
Hemiuridae is a family of trematodes belonging to the order Plagiorchiida containing 514 described species.
Syphacia is a genus of nematodes belonging to the family Oxyuridae.
Prosthogonimus is a genus of trematodes belonging to the family Prosthogonimidae.
Dichelyne is a genus of nematodes belonging to the family Cucullanidae.
Baruscapillaria is a genus of nematodes belonging to the family Capillariidae.
Holostephanus is a genus of parasitic trematodes in the family Cyathocotylidae.
