Filaria is a genus of nematodes belonging to the family Filariidae.
The thorny-headed worm family Polymorphidae contains endoparasites which as adults feed mainly in fish and aquatic birds. When this taxon was erected by Meyer in 1931, a subfamily Polymorphinae was established in it. As the Polymorphidae as presently understood would then be monotypic, with no basal genera outside the Polymorphinae, the proposed subfamily is redundant for the time being and therefore most modern treatments simply omit it. Polymorphus minutus is an economically significant parasite in goose and duck farming.
Echinorhynchus is a genus of acanthocephalan parasitic worms. They parasitize a wide variety of fishes from both marine and fresh waters. The intermediate host is usually a crustacean.
Centrorhynchidae is a family of parasitic worms. Three species of these thorny-headed worms in the genus Centrorhynchus were found to parasitize birds of prey and owls Slovakia. These hosts include Buteo buteo, Buteo rufinus, Falco tinnunculus, Asio otus, Strix aluco, Strix uralensis and Tyto alba.
Scoloplos is a genus of annelids belonging to the family Orbiniidae.
Prosthogonimus is a genus of trematodes belonging to the family Prosthogonimidae.
Bothriocephalus is a genus of flatworms belonging to the family Bothriocephalidae.
Acuaria is a genus of nematodes belonging to the family Acuariidae.
Rodentoleptis is a genus of tapeworms belonging to the family Hymenolepididae.
Ascarops is a genus of nematodes belonging to the family Spirocercidae.
Cittotaenia is a genus of tapeworms belonging to the family Anoplocephalidae.
Synhimantus is a genus of nematodes belonging to the family Acuariidae.
Cystidicoloides is a genus of nematodes belonging to the family Cystidicolidae.
Micropleura is a genus of nematodes belonging to the family Micropleuridae.
Eucoleus is a genus of nematodes belonging to the family Capillariidae.
Acanthocheilus is a genus of nematodes belonging to the family Acanthocheilidae.
Skrjabinoclava is a genus of nematodes belonging to the family Acuariidae.
Tetrabothrius is a genus of flatworms belonging to the family Tetrabothriidae.
Baruscapillaria is a genus of nematodes belonging to the family Capillariidae.
Pterothominx is a genus of nematodes belonging to the family Capillariidae.
