Family: Body often reniform; with ciliary rows making asymmetrical patterns; division within reproductive cysts (Kudo,1966).
Genus: Ovoid, inhabiting a mucilaginous sac or lorica; vestibulum large and shallow, occupying 1/3 of ventral surface; on the right of the vestibulum lie a short row of long curved cilia; a macronucleus; contractile vacuole subterminal (Carey, 1992).
C. mucicola
Japan, 1999
Cyrtolophosis sp.
Japan, 1998