Eukaryota  >  Metazoa  >  Acanthocephala  >  Palaeacanthocephala  >  Echinorhynchida

Family	Genus	Species
Arhythmacanthidae	2	6
Cavisomatidae	1	1
Echinorhynchidae	2	41
Heteracanthocephalidae	1	2
Leptorhynchoididae	8	17
Pomphorhynchidae	4	19
Pseudoacanthocephalidae	1	12
Rhadinorhynchidae	8	38