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Euplotes sp. (eurystomus ?) (obtained from Carolina
Biological Supply Co., North Carolina, U.S.A.) is a hypotrich. This
ciliate has a few rows of dorsal cilia as well as specialized clumps
of cilia called cirri on its ventral side and a complex of
membranelles called the adoral zone of membranelles (AZM). The
cell is flattened dorso-ventrally. This electron micrograph is a
longitudinal section dividing dorsal from ventral parts of the cell
and exposing the oral cavity, the thread-like macronucleus
(mac), the extended contractile vacuole (cv),
contractile vacuole pore (cvp), and a large assortment of food
vacuoles (fv) many of which contained material that was lost
during sectioning leaving holes in the section. The cytopharynx
(cp) and nascent food vacuole (nfv) along with the
discoidal (pharyngeal) vesicles (disc) are also labeled. EM
taken on 8/3/67 by R. Allen with Philips 200 TEM. Neg. 1,370X. Bar =
5µm.
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