Although flagellates have not been reported from cladocerans, they do infect copepods, another group of small freshwater crustaceans (Hitchen, 1974), and thus they might be found on cladocerans. Cephalothamnium cyclopum Stein (incertae sedis Kinetoplastea) forms stalked colonies on the copepod Cyclops sp.; one flagellum attached to a communally-secreted stalk, the other is used in food gathering