Wharton D A
Parasitology. 1979 Apr;78(2):131-43. doi: 10.1017/s0031182000049192.
The ovary of Aspiculuris tetraptera has a prominent terminal cap cell. This is considered to be part of the ovarian epithelium. Oogonia detach from the short rachis and increase in size from 6 to 60 microns; accumulating hyaline granules, shell granules and glycogen. The hyaline granules persist in the eff cytoplasm after shell formation has been completed and are considered to be lipoprotein yolk. The shell granules contribute to the non-chitin fraction of the chitinous layer. A classification of the cytoplasmic inclusions of the nematode oocyte is proposed. Upon fertilization a vitelline membrane is formed which constitutes the vitelline layer of the egg-shell. The chitinous layer is secreted in the perivitelline space, between the vitelline layer and the egg oolemma. Upon completion of chitinous layer synthesis, the egg cytoplasm contracts away from its inner surface. The material of the lipid layer is secreted at the surface of the egg cytoplasm and adheres to the inner surface of the chitinous layer. During secretion of the chitinous and lipid layers by the egg cytoplasm, the uterine cells secrete the unit membrane-like external uterine layer and the crystalline internal uterine layer. A complex system of interconnecting spaces develops in the internal uterine layer. This system is open to the exterior via breaks in the external uterine layer. There is no direct involvement of the uterine cells in the formation of this structure.
四翼无刺线虫的卵巢有一个明显的顶细胞。这被认为是卵巢上皮的一部分。卵原细胞从短的轴上脱离，大小从6微米增加到60微米；积累透明颗粒、壳颗粒和糖原。在壳形成完成后，透明颗粒保留在卵母细胞的胞质中，被认为是脂蛋白卵黄。壳颗粒构成几丁质层的非几丁质部分。提出了线虫卵母细胞胞质内含物的分类。受精时形成卵黄膜，它构成蛋壳的卵黄层。几丁质层在卵黄层和卵卵膜之间的卵周隙中分泌。几丁质层合成完成后，卵细胞质从其内表面收缩离开。脂质层的物质在卵细胞质表面分泌并附着在几丁质层的内表面。在卵细胞质分泌几丁质层和脂质层的过程中，子宫细胞分泌单位膜样的外部子宫层和结晶状的内部子宫层。内部子宫层中形成了一个复杂的相互连接的腔隙系统。这个系统通过外部子宫层的破裂与外部相通。子宫细胞在这个结构的形成过程中没有直接参与。
