Rhadinorhynchidae

thumb|right|Cathayacanthus spinitruncatus thumb|right|SEM of Rhadinorhynchus oligospinosus thumb|right|SEM of Rhadinorhynchus oligospinosus thumb|right|SEM of Rhadinorhynchus oligospinosus thumb|right|Posterior trunk of a female Cathayacanthus spinitruncatus

Micracanthorhynchina is a genus of worms belonging to the family Rhadinorhynchidae.

Raorhynchus is a genus of worms belonging to the family Rhadinorhynchidae.

Cleaveius is a genus of worms belonging to the family Rhadinorhynchidae.

Gorgorhynchus is a genus of worms belonging to the family Rhadinorhynchidae.

Leptorhynchoides is a genus of parasitic worms belonging to the family Rhadinorhynchidae.

Sclerocollum is a genus in Acanthocephala (thorny-headed worms, also known as spiny-headed worms) containing four species that parasitize fish by attaching themselves to the intestines using their hook-covered proboscis. These species have been found off the coasts of Australia, New Caledonia, French Polynesia and Palau.

Metacanthocephalus is a genus of worms belonging to the family Rhadinorhynchidae.

Paragorgorhynchus is a genus of worms belonging to the family Rhadinorhynchidae.