Nassophorea:
Microthoracida: Microthoracidae
Microthorax sp.
Engelmann, 1862
Genus: Cytostome in rear 1/3 of body (Illustrated Guide, 1985).
Irregular, almost triangular in shape; anterior pointed; posterior rounded;
distinctly flattened with a delicate keeled armour; somatic ciliation reduced;
ventrally 3 longitudinal cilary rows; cytostome in a depression at posterior ventral region;
tooth-like projection on the left side
(Carey, 1992).
Species:
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Similar Genus ->> Drepanomonas;
Kreyella
Microthorax ? or Cinetochilum ?,
cell body 25 μm long,
x 400, x 640, Japan, May-June 1999 by Y. Tsukii
50 μm
100 μm
150 μm; x 400
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).
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