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The Cytology of Sheep Rumen Ciliates. II. Ultrastructure of Eudiplodinium maggii 1
Author(s) -
Furness D. N.,
Butler R. D.
Publication year - 1985
Publication title -
the journal of protozoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 0022-3921
DOI - 10.1111/j.1550-7408.1985.tb03041.x
Subject(s) - anatomy , macronucleus , biology , ultrastructure , microtubule , cortex (anatomy) , reticulum , ciliate , microbiology and biotechnology , endoplasmic reticulum , paleontology , neuroscience
The anterior adoral zone of syncilia (AZS) of Eudiplodinium maggii is mounted on an extrusible peristome within a vestibulum. The peristome contains cytopharyngeal components derived from the infraciliature. These components include a crescent‐shaped palisade of nematodesmata, two types of sub‐membrane cytopharyngeal ribbons, and an ensheathing fibrous layer enclosing a phagoplasmic zone containing the other components. A convoluted esophagus is continuous with and extends from the posterior of the cytopharynx adjacent to the macronucleus. A posterior cytoproct has specialized cytoplasm around it and associated myoneme‐like elements. The skeletal plate is composed of finely granular platelets and lies under the cortex ventral to the macronucleus. The endoplasm is separated from the ectoplasm by a fibrous boundary layer. The cortex has an external glycocalyx, a membranous layer, epiplasm, and microtubular and microfilament layers. The AZS infraciliature is of the usual cntodiniomorph type, kinetosomes linked by a sub‐kinetosomal rod and with associated bifurcated kinetodesma, postciliary and transverse microtubules‐the latter extending into the cytopharynx—nematodesmata, and a fibrous reticulum. A possible vestigial, somatic infraciliature consisting of short, barren kinetosomes with associated basal and cortex‐directed microtubules and a periodic incomplete fiber, is found subcortically throughout the cell.