Echinorhynchida

Echinorhynchida is an order of parasitic worms in the phylum Acanthocephala. It contains the following families:
 * Arhythmacanthidae Yamaguti, 1935
 * Cavisomidae Meyer, 1932
 * Diplosentidae Tubangui and Masiluñgan, 1937
 * Echinorhynchidae Cobbold, 1876
 * Fessisentidae Van Cleave, 1931
 * Gymnorhadinorhynchidae Braicovich, Lanfranchi, Farber, Marvaldi, Luque and Timi, 2014
 * Heteracanthocephalidae Petrochenko, 1956
 * Illiosentidae Golvan, 1960
 * Isthmosacanthidae Smales, 2012
 * Pomphorhynchidae Yamaguti, 1939
 * Rhadinorhynchidae Lühe, 1912
 * Sauracanthorhynchidae Bursey, Goldberg and Kraus, 2007
 * Transvenidae Pichelin and Cribb, 2001