ectocyst


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ectocyst

[′ek·tə‚sist]
(invertebrate zoology)
The outer layer of the wall of a zooecium.
(invertebrate zoology)
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References in periodicals archive ?
The outer layer is the pericyst, which consists of compressed liver; inside this is the endocyst, a germinal layer; and inside this is the ectocyst, a thin membrane.
Cyst is composed of endocyst, ectocyst and pericyst.