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Zooplankton of the open Baltic: Extended Atlas - IOW

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Plate 4.3.7<br />

Ciliophora, Hymenostomata with distinct extrusome layer underneath<br />

pellicle. 1, Frontonia elliptica, with triangular mouth in anterior third <strong>of</strong> <strong>the</strong><br />

cell (arrow), body length 100 μm; 2, Frontonia elliptica, two contractile<br />

vacuoles are seen (arrows); 3, 4, Paramecium putrinum, oviform ciliate with<br />

conspicuous oral groove and oral aperture near mid-body, two contractile<br />

vacuoles, body length 80 μm; 5, Paramecium putrinum, contractile vacuole<br />

with satellite vacuoles (arrow); 6, 7, Paramecium putrinum, silver nitrate<br />

impregnation, silverline pattern and ovoid macronucleus with single<br />

micronucleus are readily observable (7, arrow); 8, 9, 12, Paramecium aureliacomplex,<br />

fusiform ciliate with ovoid macronucleus and two micronuclei (9,<br />

arrow), body length 115 μm; 10, 11 Paramecium aurelia-complex, contractile<br />

vacuoles with radial channels, different stages <strong>of</strong> contraction (photos E.<br />

Mironova).<br />

Photos 1, 2: live, BF; 3-5, 9-11: live, DIC; 8, 12: live, PHC; 6, 7: total<br />

preparation (wet silver nitrate impregnation).<br />

94

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