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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Rigchostoma

Rigchostoma Vuxanovici, 1963 (ref. ID; 2013)

Class Kinetofragminophora: Subclass Vestibulifera: Incertae sedis Order Trichostomatida (ref. ID; 2013)

[ref. ID; 2013]
Shape reniform with short rostrum which curves to the right (in other genera it curve to the left). Ventral surface flattened with 16-18 striations. Dorsal surface convex with 4 longitudinal ridges. Body uniformly ciliated in longitudinal rows. Oval oral aperture in an apical position at end of rostrum and bears a triangular membrane. Macronucleus spherical in anterior body half. Contractile vacuole centrally placed. Based on single record by Vuxanovici (1963) in Romania.
Quote; Colin R. Curds "British and other freshwater ciliated protozoa Part I Ciliophora: Kinetofragminophora" Cambridge University Press, 1982 (ref. ID; 2013)