Phyllopharyngea:
Cyrtophorida: Dysteriina: Dysteriidae
Dysteria calkinsi
(Calkins, 1902) Khal, 1931
Genus: Cilia in groove, opening to right; margins smooth; body kineties complete (Illustrated Guide, 1985).
Usually ovoid, ventral surface flattened; dorsal domed and longitudinally ribbed with a cleft on the right
lateral edge; a large podite with secretory canal posterior; somatic ciliation restricted to ventral
surface; a large macronucleus central; two contractile vacuoles (Carey, 1992).
Species: Cell body ovoid, 45 μm long (Carey, 1992).
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Dysteria sp.,
cell body 23 μm long, 12.5 μm wide,
x 400, x 640, Japan, April 1999, by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
Dysteria navicula Kahl, 1928:
Ovoid, elongate, up to 35 μm long;
no ribs on dorsal surface; but cleft on the right very wide; similar to D. calkinsi
but longer in the body (posterior end slightly tapered); a single macronucleus and
two micronuclei (Carey, 1992).
* Dysteria calkinsi (Calkins, 1902) Kahl, 1931:
Ovoid, 45 μm long; cleft on the right of the body
very wide in anterior; cytopharyngeal apparatus simple; six macronuclei and two
contractile vacuoles (Carey, 1992).
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