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Opercularia coarctata (obtained from Cambridge Culture
Collection, Cambridge, England, # LB1657/1). Transmission electron
micrograph (EM) of contracted cell body. This ciliate does not have
rows of basal body/cilia over its whole surface but has cilia in the
oral region and in a trochal band area (tbb). The pellicle is
sculpted into ridges and grooves that circle the body. A layer of
endoplasmic reticulum (er) lies under the pellicle next to a
layer of myonemal fibers (my). mac, macronucleus;
cv, contractile vacuole; m, mitochondrion; pi,
peristome. EM taken on 6/12/69 by R. Allen with Philips 300 TEM. Neg.
4,270X. Bar = 1µm.
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