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Electron micrograph of the surface of Vorticella convallaria.
Like other peritrichs the pellicle is sculpted into ridges and grooves
that circle the cell perpendicular to the aboral/adoral axis of the
cell body. Pellicular pores (pp) penetrate the pellicle as
cylindrical indentations of the plasma membrane (see Fig.3) that end
as clathrin-coated pits. A system of alveoli underlies the plasma
membrane and rod-like densities occupy the cytosolic tips of the
pellicular ridges. A fibrous epiplasm (ep) covers the inside of
the alveoli. Distinct myonemal bands run in the aboral to adoral
direction (indicated by arrows) just inside the epiplasm. These
bands are associated with the endoplasmic reticulum (er) by
unique specializations of the ER (see Fig 17). In this EM preparation
the ER has artifactually segmented into vesicles caused by the
fixation process. Mitochondria (m) occupy the space between the
bands. EM taken on 4/15/71 by R. Allen with Hitachi HU11A TEM. Neg.
9,250X. Bar = 1µm.
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