Family: With two flagella; one directed anteriorly and the other posteriorly and trailing (recurrent flagellum); flagella orininate in anterior end; one to several contractile vacuoles (Kudo, 1966).
Rhynchomomas ?
μm
Japan, 199?
Cercomonas ?
C. parva ?
μm
Tsukuba
Ibaraki, 2000
