Margaritis L H, Petri W H, Kafatos F C
J Exp Zool. 1976 Dec;198(3):403-8. doi: 10.1002/jez.1401980314.
The endochorion of the Drosophila melanogaster eggshell has been isolated and its structure examined by transmission and scanning electron microscopy. In the main shell the thin inner endochorion (floor) shows small pits or pores and characteristic fenestrae crossed by irregular strands; vertical columns surrounded by air spaces separate this layer from the thick outer endochorion (roof) which is covered by a regular, external reticulum of thin fibers. The endochorion of the respiratory horns has sharply divided dorsal and ventral surfaces, with characteristic structures somewhat reminiscent of the floor and the external reticulum of the roof, respectively.
黑腹果蝇卵壳的内 chorion 已被分离出来，并通过透射电子显微镜和扫描电子显微镜对其结构进行了检查。在主壳中，薄的内 endochorion（底部）显示出小坑或小孔以及由不规则细丝交叉的特征性小孔；被气隙包围的垂直柱将这一层与厚的外 endochorion（顶部）分开，外 endochorion 覆盖着规则的外部细纤维网状结构。呼吸角的 endochorion 有明显分开的背腹表面，其特征结构分别有点让人想起底部和顶部的外部网状结构。
