Euplotes sp. (eurystomus ?) 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 involved in feeding called the adoral zone of membranelles. 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, the extended contractile vacuole, contractile vacuole pore, and a large assortment of food vacuoles many of which contained material that was lost during sectioning leaving holes in the section. The cytopharynx and nascent food vacuole along with the discoidal (pharyngeal) vesicles are also seen. TEM taken on 8/3/67 by R. Allen with Philips 200 operating at 60kV. Neg. 1,370X. Bar = 5?m. Standard glutaraldehyde fixation followed by osmium tetroxide, dehydrated in alcohol, and embedded in an epoxy resin. Microtome sections prepared at approximately 75nm thickness. A print of the negative was scanned and processed in Photoshop. This image is best used for qualitative analysis. A high resolution version of this image is in the library (CIL:38867) and is available for quantitative analysis. Additional information is available at (http://www5.pbrc.hawaii.edu/allen/).
Biological Process: Ciliary or flagellar motility, Macronucleus organization, Cytoplasm organization
Author: Richard Allen