Euplotes,
65 μm long,
45 μm wide,
peristome about 2/3 of the body length, 5 transverse cirri,
four dorsal ridges,
x 400, x 640, Uruguay, November 1999, photo by Y. Tsukii
50 μm
100 μm
150 μm; x 400 :
31 μm
63 μm
94 μm; x 640
Cyst formation
E. aspheronicus Agamaliev, 1966: Cell body ellipsoid, not ornamented, 60 μm long; peristome 1/2 of the body length; 9 frontoventral, 5 transverse, 4 caudal cirri; macronucleus C-shaped (Carey, 1992).
E. zenkewitchi Burkovsky, 1970: Cell body elongate rather than ovoid, not ornamented, 80 μm long; peristome narrow, 1/2 of the body length; 9 frontoventral, 5 transverse, 3 or 4 caudal cirri; macronucleus C-shaped (Carey, 1992).
E. cristatus Kahl, 1930-5: Cell body small and ovoid, dorsally six prominent ridges, 60 μm long; peristome narrow, 1/2 of the body length; 10 frontoventral, 5 transverse, 4 caudal cirri; macronucleus C-shaped (Carey, 1992).