FB2026_03 , released September 17, 2026
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Term inner chorionic layer ID (Ontology) FBbt:00000039 (Fly Anatomy)
Definition The middle layer that envelops the oocyte and forms part of the eggshell. It surrounds a thin wax layer, which in turn envelops the vitelline membrane. The inner chorionic layer is 40-50nm wide and consists of 8-10 crystalline sublayers that appear as horizontal striations, parallel to the oocyte surface and spaced at approximately 5nm.[ FlyBase:FBrf0029042 FlyBase:FBrf0035166 ]
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Alleles (FBal)PHENOTYPE_MANIFEST_IN
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chorion_________________________
acellular anatomical structure__|
                                chorionic layer
                                 |__inner chorionic layer  1 rec.
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