Family Amphizoidae Leconte 1853 (trout-stream beetle)
Parent taxon: Adephaga according to J. F. Lawrence and A. F. Newton 1995
Sister taxa: Amphoxyne, Carabidae, Carabiformia, Carabilarva, Chimaerocoleus, Colymbotethidae, Coptoclavidae, Dytiscidae, Eodromeites, Gyrinidae, Haliplidae, Hygrobiidae, Memptus, Necronectulus, Noteridae, Pseudomorphinae, Rhysodidae, Trachypachidae, Triadogyrus, Triaplidae, Tritarsidae
Subtaxa: none
Ecology: