The three ciliary membranelles in the buccal cavity from which this class of ciliates gets its name, Oligohymenophorea, are each composed of four rows of basal body/cilium complexes. The quadrulus has four rows of cilia less tightly packed and interspersed with parasomal sacs. The dorsal and ventral peniculi are more tightly packed. In this micrograph only 6 or 7 rows of peniculi are present at this level since the rows of the peniculi do not go all the way to the posterior end but rows end in a staggered way somewhere along the length of the buccal cavity. The quadrulus borders the cytopharynx over its full length and goes to the posterior end of the buccal cavity. TEM taken on 3/30/73 by R. Allen with Hitachi HU11A operating at 75kV. Neg. 10,750X. Bar = 0.5µm.
Standard glutaraldehyde fixation followed by osmium tetroxide, dehydrated in alcohol and embedded in an epoxy resin. Microtome sections prepared at approximately 75nm thickness. The negative was printed to paper and the image was scanned to Photoshop. This digitized image is available for qualitative analysis. There is a high resolution version of this image in the library (CIL:39162) which is available for quantitative analysis. Additional information available at (http://www5.pbrc.hawaii.edu/allen/).
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