epicone

epicone

[′ep·ə‚kōn]
(invertebrate zoology)
The part anterior to the equatorial groove in a dinoflagellate.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Within the cell wall of the vegetative mother cell, a metamorphosis occurs that results in the development of a characteristically gymnodinioid motile cell with thecae, hypocone, epicone, and longitudinal and transverse flagellae in their respective grooves or furrows (Freudenthal, 1962; Loeblich and Sherley, 1979).