 
 
|  Genus: Species: | 
 31 μm
 31 μm
 63 μm
 63 μm
 94 μm; x 640
 94 μm; x 640
 
 
 
 
M. simulans Kahl: 30-35 μm long (Kudo, 1966). Body laterally compressed; 30-35 μm long; several ridges on left side; 3 rows of cilia & cytostome on right side; cytostome post-central; with curved ectoplasmic lip bearing a small undulating membrane on the inner side; two contractile vacuoles (How to know the protozoa, 1979).
M. sulcatus Englemann, 1862: 30-40 μm long; a single macronucleus; two contractile vacuoles (Carey, 1992).