Eukaryota  >  Metazoa  >  Tardigrada  >  Heterotardigrada  >  Arthrotardigrada

Family	Genus	Species
Batillipedidae	1	9
Coronarctidae	1	1
Halechiniscidae	6	17
Renaudarctidae	2	2
Stygarctidae	2	5
Styraconyxidae	5	7
Tanarctidae	2	4