C. mucicola Stokes, 1885: 28 μm long; vestibulum large and shallow; a macronucleus central; a contractile vacuole subterminal; inhabiting a mucilaginous lorica (Carey, 1992). Only one contractile vacuole subterminal; length of cell < 40 μm; elongated cilia at anterior end; lives in dwelling-tube; cell body ellipsoid (Foissner, 1993).