Giardia lamblia
Protozoa | Sarcomastigophora | Zoomastigophora | Diplomonadida | Hemaxitidae | Giardia | Giardia lamblia
Giardia duodenalis
Protozoa | Metamonada | Trepomonadea | Distomatida | Hexamitidae | Giardia | Giardia duodenalis