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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
(ps). 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. cp mt, cytopharyngeal microtubules; disc,
discoidal vesicles. EM taken on 3/30/73 by R. Allen with Hitachi HU11A
TEM. Neg. 10,750X. Bar = 0.5µm.
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