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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Urozona

Urozona Schewiakoff, 1889 (ref. ID; 2014, 7452)

Class Oligohymenophora: Subclass Hymenostomata: Order Scuticociliatida (ref. ID; 2014)

[ref. ID; 2014]
Small (about 20 um long), barrel-shaped ciliate that is broadly rounded at its extremities. Oral aperture located at the equator of the body and is bordered on the right by a short undulating membrane. One or two short, oblique adoral membranelles on the left. Somatic ciliation restricted to one equatorial girdle of 21-22 short longitudinal rows do not reach the terminal pole while Jankowski (1964) observed that a few on the immediate left of the aperture did so. Contractile vacuole sub-terminal. Spherical macronucleus in posterior body half. Single species genus, although descriptions of it very considerably.
Quote; Colin R. Curds, Michael A. Gates and David McL. Roberts "British and other freshwater ciliated protozoa Part II Ciliophora: Oligohymenophora and Polyhymenophora" Cambridge University Press, 1983 (ref. ID; 2014)
  1. Urozona buetschli Schewiakoff, 1889 (ref. ID; 1219, 1622, 1629, 2245) reported year? (ref. ID; 1618) reported author and year? (ref. ID; 191), buetschlii Schewiakoff, 1889 (ref. ID; 4611)

Urozona buetschli Schewiakoff, 1889 (ref. ID; 1219, 1622, 1629, 2245) reported year? (ref. ID; 1618) reported author and year? (ref. ID; 191), buetschlii Schewiakoff, 1889 (ref. ID; 4611)

Descriptions

Cilia in 1 girdle encircling the middle of the body, 1 long caudal cilium, the rest of the cell is bare; buccal cavity situated equatorially within the girdle of cilia, mouth equipment contains 1 undulating membrane and 2 membranelles, which are revealed by impregnation with silver nitrate; contractile vacuole and nuclei situated near the posterior end of the cell; body surface free of cilia shows fine longitudinal lines; forward swimming is alternated with periods of quick rotation in one place. (ref. ID; 1219)
In stagnant water. (ref. ID; 1618)

Measurements

Body length 20-30 um. (ref. ID; 1219)
20-25 um (Kahl); 30-40 um (Schewiakoff). (ref. ID; 1618)