Eukaryota  >  Metazoa  >  Kinorhyncha  >  Cyclorhagida

Family	Genus	Species
Antygomonidae	1	6
Cateriidae	1	1
Centroderidae	3	11
Dracoderidae	1	5
Echinoderidae	4	57
Semnoderidae	2	3
Zelinkaderidae	2	6