exochorion


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exochorion

the outer layer of the chorion of the insect egg which is secreted by follicular cells in the insect ovary.
References in periodicals archive ?
Support for the hypothesis that phasmid eggs can be dispersed via digestion and elimination by a vertebrate predator is that phasmid eggs possess a distinct layer of calcium oxalate in the outer exochorion layer of their eggshells (Pantel 1919, Robertson 1941, Moscona 1950, Clark 1958) that requires a pH of 2 to dissolve (Moscona 1950).
The exochorion is wider compared to the endochorion, and it includes a variety of columns with different lengths and widths and with air sponges.