Eukaryota  >  Metazoa  >  Tardigrada  >  Heterotardigrada  >  Arthrotardigrada

Family	Genus	Species
Batillipedidae	1	12
Coronarctidae	1	1
Halechiniscidae	6	19
Renaudarctidae	2	2
Stygarctidae	2	6
Styraconyxidae	6	9
Tanarctidae	2	5