n.鰓蓋；蘚蓋；果蓋

A flaplike covering, such as an operculum. 片狀蓋，例如蒴蓋

The shell rim joining the operculum was thick and prominent. 看不出蟲齡間的皮棘差異。

Capsules dehiscent by an operculum slightly distal to middle. 通過一個蓋稍上部至中部開裂的蒴果。

If you do, and must return your good wishes and happy operculum laugh! 如果你做到了，回報你的一定是美好的祝愿，幸福的笑厴！

Micropylar collar and the undeveloped forms of operculum were differentiated at the micropylar region. 珠孔區(qū)有珠孔領(lǐng)和孔蓋的分化，但珠孔領(lǐng)分化不完善。