Eukaryota  >  Metazoa  >  Kinorhyncha

Family	Genus	Species
Antygomonidae	1	6
Cateriidae	1	1
Centroderidae	3	11
Dracoderidae	1	5
Echinoderidae	4	60
Franciscideridae	1	1
Neocentrophyidae	1	2
Pycnophyidae	6	22
Semnoderidae	2	3
Zelinkaderidae	2	6