Trichodinella
Trichodinella Sramek-Husek, 1953 (ref. ID; 2014)
Class Oligohymenophora: Subclass Peritricha: Order Peritrichida: Suborder Mobilina (ref. ID; 2014)
[ref. ID; 2014]
The body is cylindrical, and the peristome is convex. The peristomial wreaths (membranelles) never complete a circle and usually travel through 180-270 degrees. The elements of the aboral disc differ from those of the other mobiline peritrichs since they have a centrifugal process but no centripedal ray. The macronucleus is horseshoe-shaped and lie in a horizontal plane.
There are 3 freshwater species which all live on fishes.
The genus is most easily confused with Semitrichodina whose peristomial wreaths also turn through 180-270 degrees, but whose denticles 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)