Nematoda
- Ascaridae
Large roundworms parasitic in intestines of vertebrates.
- Oxyuridae
Pinworms.
- Cephalobidae
A family of Nematoda.
- Tylenchidae
A family of Nematoda.
- Ancylostomatidae
Hookworms.
- Filariidae
Threadlike roundworms.
- Dracunculidae
Greatly elongated roundworm.
Trematoda
- Fasciolidae
A family of Trematoda.
- Schistosomatidae
A family of Trematoda.
Also contains
- Terebellidae
Marine burrowing or tube-forming polychete worms usually having long thick bodies.
- Hirudinidae
A family of Hirudinea.
- Taeniidae
A family of Cestoda.
- Branchiobdellidae
Small annelid worms with the posterior end modified into an adhesive sucker; especially...