Ctedoctema Stokes 1884

Portrait (left side) of the pleuronematine scuticociliate, Ctedoctema acanthocryptum (Stokes, 1884). The species name has been corrected by Foissner from acanthocrypta to acanthocryptum to agree with the neuter genus name.Small elongate to oval ciliate that is slightly dorsoventrally compressed. There is a prominent paraoral membrane, which begins subapically and extends approximately two-third down the length of the cell in a shallow groove. The cytostome is at the posterior end of this groove. There is a three part adoral zone of membranelles on the left of the peristome. M1 is a longitudinal array of dikinetids from the sub-apical pole to about midway down the cell. M2 and M3 are small, oblique patches of kinetids posterior to M1. Somatic ciliation uniform. There is a small unciliated “frontal plate” at the anterior apex. The edge of the pellicle appears slightly serrated. Numerous trichocysts present. Ovoid macronucleus in anterior body half. The contractile vacuole is posterior subterminal. Collected from freshwater pond near Boise, Idaho October 2004. DIC optics.

Ctedoctema acanthocryptum Scale bar indicates 10 µm. Collected from a pond near Lemkendorf, isle of Fehmarn (Baltic Sea). The image was built up using several photomicrographic frames with manual stacking technique. The images were taken using Zeiss Axioplan with Canon EOS 70D.Image under Creative Commons License V 3.0 (CC BY-NC-SA). Place name: Pond in Lemkendorf, isle Fehmarn (Baltic Sea, Germany) Latitude: 54,472296 Longitude: 11,095662 Multiebenen-Abbildung, manuell gestapelt. Der Messbalken markiert eine Länge von 10 µm. Probe aus dem Dorfteich Lemkendorf, Insel Fehmarn. Mikrotechnik: Zeiss Axioplan, Kamera: Canon EOS 70D. Creative Commons License V 3.0 (CC BY-NC-SA). For permission to use of (high-resolution) images please contact postmaster@protisten.de.

Ventral infraciliature of the pleuronematine scuticociliate, Ctedoctema acanthocryptum (Stokes, 1884). The species name has been corrected by Foissner from acanthocrypta to acanthocryptum to agree with the neuter genus name.Small elongate to oval ciliate that is slightly dorsoventrally compressed. There is a prominent paraoral membrane (seen here), which begins subapically and extends approximately two-third down the length of the cell on the right side of a shallow groove. The cytostome is at the posterior end of this groove. There is a three part adoral zone of membranelles on the left of the peristome. M1 is a longitudinal array of dikinetids from the sub-apical pole to about midway down the cell. The posterior end of M1 is obscured here by the densely stained macronucleus. M2 and M3 are small, oblique patches of kinetids posterior to M1. M2 is obscured by the macronucleus. M3 is seen here just posterior to the macronucleus. Somatic ciliation uniform. There is a small unciliated “frontal plate” at the anterior apex(seen here). The edge of the pellicle appears slightly serrated. Numerous trichocysts present. Ovoid macronucleus in anterior body half. The contractile vacuole is posterior subterminal. Collected from freshwater pond near Boise, Idaho October 2004. Silver carbonate stain (see Foissner, W.Europ. J. Protistol.27, 313-330; 1991). Brightfield optics. 

Ventral infraciliature of the pleuronematine scuticociliate, Ctedoctema acanthocryptum (Stokes, 1884). The species name has been corrected by Foissner from acanthocrypta to acanthocryptum to agree with the neuter genus name.Small elongate to oval ciliate that is slightly dorsoventrally compressed. There is a prominent paraoral membrane (seen here), which begins subapically and extends approximately two-third down the length of the cell on the right side of a shallow groove. The cytostome is at the posterior end of this groove. There is a three part adoral zone of membranelles on the left of the peristome. M1 is a longitudinal array of dikinetids from the sub-apical pole to about midway down the cell. The posterior end of M1 is obscured here by the densely stained macronucleus. M2 and M3 are small, oblique patches of kinetids posterior to M1. Both M2 and M3 are seen here just posterior to the macronucleus. Somatic ciliation uniform. There is a small unciliated “frontal plate” at the anterior apex. The edge of the pellicle appears slightly serrated. Numerous trichocysts present. Ovoid macronucleus in anterior body half. The contractile vacuole is posterior subterminal. Collected from freshwater pond near Boise, Idaho October 2004. Silver carbonate stain (see Foissner, W.Europ. J. Protistol.27, 313-330; 1991). DIC optics. 

Portrait (left side) of the pleuronematine scuticociliate, Ctedoctema acanthocryptum (Stokes, 1884). The species name has been corrected by Foissner from acanthocrypta to acanthocryptum to agree with the neuter genus name.Small elongate to oval ciliate that is slightly dorsoventrally compressed. There is a prominent paraoral membrane, which begins subapically and extends approximately two-third down the length of the cell in a shallow groove. The cytostome is at the posterior end of this groove. There is a three part adoral zone of membranelles on the left of the peristome. M1 is a longitudinal array of dikinetids from the sub-apical pole to about midway down the cell. M2 and M3 are small, oblique patches of kinetids posterior to M1. Somatic ciliation uniform. There is a small unciliated “frontal plate” at the anterior apex. The edge of the pellicle appears slightly serrated. Numerous trichocysts present. Ovoid macronucleus in anterior body half. The contractile vacuole is posterior subterminal. Collected from freshwater pond near Boise, Idaho October 2004. DIC optics. 

Portrait (left side)of the pleuronematine scuticociliate, Ctedoctema acanthocryptum (Stokes, 1884). The species name has been corrected by Foissner from acanthocrypta to acanthocryptum to agree with the neuter genus name.Small elongate to oval ciliate that is slightly dorsoventrally compressed. There is a prominent paraoral membrane, which begins subapically and extends approximately two-third down the length of the cell in a shallow groove. The cytostome is at the posterior end of this groove. There is a three part adoral zone of membranelles on the left of the peristome. M1 is a longitudinal array of dikinetids from the sub-apical pole to about midway down the cell. M2 and M3 are small, oblique patches of kinetids posterior to M1. Somatic ciliation uniform. There is a small unciliated “frontal plate” at the anterior apex. The edge of the pellicle appears slightly serrated. Numerous trichocysts present. Ovoid macronucleus in anterior body half. The contractile vacuole is posterior subterminal. Collected from freshwater pond near Boise, Idaho October 2004. DIC optics. 

Ventral infraciliature of the pleuronematine scuticociliate, Ctedoctema acanthocryptum (Stokes, 1884). Small elongate to oval ciliate that is slightly dorsoventrally compressed. There is a prominent paraoral membrane (POM), which begins subapically and extends approximately two-third down the length of the cell on the right side of a shallow groove. The cytostome is at the posterior end of this groove. There is a three part adoral zone of membranelles on the left of the peristome. M1 is a longitudinal array of dikinetids from the sub-apical pole to about midway down the cell. The posterior end of M1 is obscured here by the densely stained macronucleus. M2 and M3 are small, oblique patches of kinetids posterior to M1. Somatic ciliation uniform. Ovoid macronucleus in anterior body half. Collected from freshwater pond near Boise, Idaho October 2004. Silver carbonate stain (see Foissner, W.Europ. J. Protistol.27, 313-330; 1991). Brightfield optics.

Oral infraciliature of the pleuronematine scuticociliate, Ctedoctema acanthocryptum (Stokes, 1884). Small elongate to oval ciliate that is slightly dorsoventrally compressed. There is a prominent paraoral membrane (green arrowhead) which begins subapically and extends approximately two-thirds down the length of the cell on the right side of a shallow groove. The cytostome is at the posterior end of this groove. There is a three part adoral zone of membranelles on the left of the peristome. M1 (yellow arrowhead) is a longitudinal file of dikinetids from the sub-apical pole to about midway down the cell. M2 (pink arrowhead) and M3 (light blue arrowhead) are small, oblique patches of kinetids posterior to M1. Somatic ciliation uniform (not seen in this preparation). The dark blue arrowhead marks the single long caudal cilium.Collected from freshwater pond near Boise, Idaho October 2004. Silver carbonate stain (see Foissner, W.Europ. J. Protistol.27, 313-330; 1991). Brightfield optics.