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Spirotrichea: Hypotrichia: Euplotida: Euplotidae

 Euplotes eurystomus
(Wrzesniowski, 1870) Kahl, 1930-5

Euplotes eurystomus Genus: Cell body is ovoid, dorsoventrally flattened; dorsal surface may be equipped with some ornamentation; three groups of cirri (frontoventral, transverse & caudal); macronucleus C-shaped, "3"-shaped, or horsehoe-shaped (Carey, 1992).
Species: Large, ovoid; 160 μm long; peristomial collar present (high & prominent), right peristomial lip with depression; no ornamentations; wide buccal area wide, triangular in shape; peristome 1/2 of the body length; 9 frontoventral, 5 transverse, 4 caudal cirri; macronucleus "3"-shaped (Carey, 1992).

Euplotes eurystomus, 150 μm long, 88 μm wide, 4 caudal cirri, macronucleus 3-shaped, peristome more than 1/2 of body length (nearly 2/3 ?), peristomial collar present (right lip with depression), x 200, Tokyo, Japan, 199? by Y. Tsukii
scale 100 μm scale 200 μm scale 300 μm; x 200
Euplotes eurystomus Euplotes eurystomus
Euplotes eurystomus, living cells fed on Chlorogonium, x 100 (left) & x 400, by Y. Tsukii
scale 50 μm scale 100 μm scale 150 μm; x 400
Euplotes eurystomus Euplotes eurystomus Euplotes eurystomus Euplotes eurystomus Euplotes eurystomus

Euplotes eurystomus, fixed with aceto-alcohol (1:3), by Y. Tsukii
Euplotes eurystomus, fixed with �u�A�����t, x 200 & x 400, by Y. Tsukii
Euplotes eurystomus, double-stained with azure C and fastgreen, x 400, by Y. Tsukii
Euplotes eurystomus Euplotes eurystomus Euplotes eurystomus Euplotes eurystomus Euplotes eurystomus

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