epicyst

epicyst

[′ep·ə‚sist]
(invertebrate zoology)
The outer layer of a cyst wall in encysted protozoans. Also known as ectocyst.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The quadrangular archeopyle is located on the dorsal epicyst and reflects the loss of the 3' pre-cingular paraplate (Fig.