The Water Fleas (Cladocera) - order
(Ctenopoda) - suborder

(Holopediidae)
- family

(Sididae)
- family
(Anomopoda) - suborder

(Bosminidae)
- family

(Chydoridae)
- family

(Daphniidae)
- family

(Gondwanotrichidae)
- family

(Macrotrichidae)
- family
(Onychopoda) - suborder

(Cercopagididae)
- family

(Podonidae)
- family

(Polyphemidae)
- family
(Haplopoda) - suborder

(Leptodoridae)
- family