Eukaryota  >  Metazoa  >  Arthropoda  >  Ichthyostraca

Order	Family	Genus	Species
Arguloida	1	3	39
Cephalobaenida	1	0	0
Porocephalida	5	10	52
Raillietiellida	1	1	13
Reighardiida	1	2	3