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Cell division and reformation of the amphiesma in the pelliculate dinoflagellate, Heterocapsa niei

Published online by Cambridge University Press:  11 May 2009

Lenitac Morrill  and
Alfred R. Loeblich
Lenitac Morrill
Affiliation:
University of Houston, Marine Science Program, 4700 Avenue U, Galveston, TX 77550, U.S.A.
Alfred R. Loeblich
Affiliation:
University of Houston, Marine Science Program, 4700 Avenue U, Galveston, TX 77550, U.S.A.
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Abstract

Cytokinesis is described for the first time in a pelliculate dinoflagellate that retains its thecal plates during cell division. In Heterocapsa niei cytokinesis proceeded in a manner that differed from that described for other dinoflagellates. The thecal plates separated along the fission line before the development of a cleavage furrow. A distinct cleavage furrow developed as cytokinesis progressed. The outer membrane and the outer plate membrane expanded during division to enclose the enlarging cell undergoing cytokinesis; however, as the cleavage furrow deepened, these membranes were not continuous with the cytoplasm. The pellicle was occasionally intermittent in the region of the cleavage furrow, possibly facilitating movement of material from the cytoplasm to the developing outer membranes. Thecal plate formation occurred within the thecal vesicle from unrecognizable precursors.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 64 , Issue 4 , November 1984 , pp. 939 - 953
Copyright
Copyright © Marine Biological Association of the United Kingdom 1984

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