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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ctedoctema

Ctedoctema Stokes, 1884 (ref. ID; 2014)

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

[ref. ID; 2014]
Small (20-30 um long) elongate to oval ciliate that is slightly dorso-ventrally compressed. There is a prominent membranellar system which begins sub-apically and extends approximately two-third down the length of the cell in a shallow groove. The undulating membrane does not form a distinct pouch or pocket in its posterior end as is does in Cyclidium. Membranelle M1 travels longitudinally from the sub-apical pole to about midway down the cell. Membranelles M2 and M3 much smaller and compact, traveling transversely and difficult to observe in the living cell. Oral aperture situated sub-equatorially. Somatic ciliation uniform, cilia long in comparison with body size. Edge of cuticle serrated. Numerous trichocysts present. Ovoid macronucleus in anterior body half.
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. Ctedoctema acanthocrypta Stokes, 1884 (ref. ID; 1219, 1335, 1622, 2245, 3593) reported year? (ref. ID; 1618, 3698)
  2. Ctedoctema acanthocryptum Stokes, 1884 (ref. ID; 4488, 4611) reported author and year? (ref. ID; 1629)
    Syn; Ctedoctema acanthocrypta Stokes, 1884 (ref. ID; 4611)

Ctedoctema acanthocrypta Stokes, 1884 (ref. ID; 1219, 1335, 1622, 2245, 3593) reported year? (ref. ID; 1618, 3698)

Descriptions

Ovoid; anterior end truncate; macronucleus round, anterior; in fresh water among vegetation. (ref. ID; 1618)

Measurements

About 35 um long. (ref. ID; 1618)