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...