Kawamoto F, Suto C, Kumada N
Jpn J Med Sci Biol. 1978 Jun;31(3):291-9. doi: 10.7883/yoken1952.31.291.
Scanning and transmission electron microscopy (SEM and TEM) revealed unique structures and development of the venomous spicules of tussock moth caterpillars of the genus Euproctis: (1) Flower-like structure at the distal end and a longitudinal minute depression on the proximal subapical wall of these spicules were observed by SEM. This depression was revealed to be a small hole by TEM. (2) During molting, observed were cytoplasmic processes of several trichogen cells penetrating the cytoplasm of a tormogen cell to form the spicules with the holes at their subapical portions. A papilla was formed by a tormogen and several epidermal cells. (3) After the molting, the cytoplasmic process in a spicule disappeared and the spicule cavity was replaced by electron-dense materials secreted apparently from the trichogen cell. (4) It was considered that the electron-dense materials were the main toxic or precursory substances in the Euproctis spicules.
扫描电子显微镜和透射电子显微镜（SEM和TEM）揭示了优雪苔蛾属毒蛾幼虫毒刺的独特结构及其发育过程：（1）通过扫描电子显微镜观察到，这些毒刺的远端呈花状结构，近端亚顶端壁上有一条纵向微小凹陷。透射电子显微镜显示该凹陷是一个小孔。（2）在蜕皮过程中，观察到几个毛原细胞的细胞质突起穿透一个膜原细胞的细胞质，形成亚顶端部分有孔的毒刺。一个膜原细胞和几个表皮细胞形成一个乳头。（3）蜕皮后，毒刺中的细胞质突起消失，毒刺腔被明显由毛原细胞分泌的电子致密物质取代。（4）据认为，这些电子致密物质是优雪苔蛾毒刺中的主要有毒物质或前体物质。
