Richard Allen (2011) CIL:38863, Didinium nasutum, cell by organism, eukaryotic cell, Eukaryotic Protist, Ciliated Protist. CIL. Dataset

High resolution image of Didinium (non-dividing) has a massive cytopharynx at its anterior end that takes the shape of a cone-shaped proboscis when closed. This cytopharynx contains numerous lamellae composed of sets of microtubules that lie perpendicular to each other next to the cytopharyngeal membrane. Vesicles containing a uniform medium dense material (mucocysts?), line up between the lamellae. Presumably these vesicles fuse with the single cytopharyngeal membrane that covers the lamellae. Extrusomes called toxicysts lie within in the cytopharyngeal region. TEM taken on 9/19/68 by R. Allen with Philips 300 operating at 60kV. Neg. 10,300X.

高分辨率的Didinium（非分裂）图像显示，其前端拥有一个庞大的胞咽结构，当闭合时呈现出圆锥形的喙状。此胞咽内包含由相互垂直排列的微管束组成的多个鳃片。含有均匀中等密度的物质（可能为粘液囊？）的囊泡排列在鳃片之间。推测这些囊泡与覆盖鳃片的单一胞咽膜融合。被称为毒囊的排泄体位于胞咽区域内。该透射电子显微镜（TEM）图像由R. Allen于1968年9月19日使用Philips 300型仪器在60kV的电压下拍摄。负性放大倍数为10,300倍。