Stick insects have elaborate mechanosensory organs in their subgenual organ complex in the proximal tibia, particularly the distal organ with scolopidial sensilla in linear arrangement. For early postembryonic developmental stages of Sipyloidea sipylus (Phasmatodea: Necrosciinae), the neuroanatomy of the scolopidial organs in the subgenual organ complex and the campaniform sensilla is documented by retrograde axonal tracing, and compared to the adult neuroanatomy. Already after hatching of the first larval instars are the sensory structures of subgenual organ and distal organ as well as tibial campaniform sensilla differentiated. In the distal organ, the full set of sensilla is shown in all larval stages examined. This finding indicates that the sensory organs differentiate during embryogenesis, and are already functional by the time of hatching. The constancy of distal organ sensilla over postembryonic stages allows investigation of the representative number of sensilla in adult animals as well as in larval instars. Some anatomical changes occur by postembryogenic length increase of the distal organ, and grouping of the anterior subgenual sensilla. The embryonic development of scolopidial sensilla is similar for auditory sensilla in hemimetabolous Orthoptera (locusts, bushcrickets, crickets) where tympanal membranes develop during postembryogenic stages, conferring a successive gain of sensitivity with larval moults.

中文翻译：

---

棒状昆虫Sipyloidea sipylus的亚属器官复合体的胚后早期发育。

竹节虫在胫骨近端的其下属器官复合体中具有复杂的机械感官器官，尤其是具有呈螺旋形排列的冠状感觉的远端器官。对于早熟的Sipyloidea sipylus（Phasmatodea：Necrosciinae）的胚胎后发育阶段，通过逆行轴突描记记录了亚属器官复合体和坎帕尼样感觉细胞中的脊髓器官的神经解剖，并与成人的神经解剖进行了比较。在孵化第一批幼虫后，已经将亚生殖器官和远端器官的感觉结构以及胫骨弯曲状的感觉器区分开。在远端器官中，在检查的所有幼体阶段均显示完整的感官。该发现表明感觉器官在胚胎发生期间分化，并且在孵化时已经起作用。胚胎后阶段远端器官感官的恒定性允许调查成年动物以及幼虫期中感官的代表性数量。一些解剖学变化是由于远端器官的胚后长度增加和前下感官的分组而发生的。鼻咽感觉器的胚胎发育与半代谢直翅目（蝗虫，丛林cri，）的听觉感觉相似，鼓膜在成胚后阶段发育，从而使幼虫蜕皮获得了连续的敏感性。和前下感官的分组。鼻咽感觉器的胚胎发育与半代谢直翅目（蝗虫，丛林cri，）的听觉感觉相似，鼓膜在成胚后阶段发育，从而使幼虫蜕皮获得了连续的敏感性。和下前感官的分组。鼻咽感觉器的胚胎发育与半代谢直翅目（蝗虫，丛林cri，）的听觉感觉相似，鼓膜在成胚后阶段发育，从而使幼虫蜕皮获得了连续的敏感性。