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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Semitrichodina

Semitrichodina Kazubsky, 1958 (ref. ID; 2014)

Class Oligohymenophora: Subclass Peritricha: Order Peritrichida: Suborder Mobilina (ref. ID; 2014)

See Trichodoxa

[ref. ID; 2014]
Body cylindrical to cap-shaped with convex peristome, whose ciliary wreaths never make a complete turn and the angle varies from 180-270 degrees. The aboral end is typically suctorial and the denticles resemble those of Trichodina, i.e. the elements have both a centrifugal process and a centripedal ray. The macronucleus is horseshoe-shaped. There are 4 freshwater species which all occur on fishes. Most mainly mistaken for Trichodinella whose peristomial wreaths also turn through 180-270 degrees, however the denticles of the latter genus do not possess centripedal rays.
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. Semitrichodina genitalis (Sirgel, 1983) Guhl, 1988 (ref. ID; 4764 redescribed paper)
    Syn; Trichodoxa genitalis Sirgel, 1983 (ref. ID; 4764); Trichodoxa phalli Sirgel, 1983 (ref. ID; 4764)