中文摘要：

基于 hunanensisrecently 恢复从的 Markuelia 的更精致地保存的标本中间、上面在西方的湖南并且根据 Synchrotronradiation X光检查tomo图形的显微镜学寒武纪，从劈开 throughorganogenesis 的发展顺序到寒武纪的胚胎 Markuelia 预先孵，特别发展顺序在预先孵的阶段期间，即从最早的时期， scalids 和尾巴什么时候消瘦，仅仅形成了到最近的时期(几乎孵化)，被建立。Thisdevelopmental 顺序在预先孵的阶段期间提供胚胎的开发的一个模式，它没在生活 scalidophorans 被建立(priapulids， loriciferans andkinorhynchs ) 。因此，它不仅在 Markuelia 的现存后代的胚胎的开发充实我们的知识，而且打开一个新窗口到动物的进化和开发。

英文摘要：

Based on more exquisitely preserved specimens of Markuelia hunanensis recently recovered from Middle and Upper Cambrian in western Hunan and in the light of Synchrotron radiation X-ray tomographic microscopy, the developmental sequence from cleavage through organogenesis to the pre-hatching of Cambrian embryo Markuelia, especially the developmental sequence during the pre-hatching stage, i.e. from the earliest period when the scalids and tail spines only took shape to the latest period （just about hatching）, is established. This developmental sequence provides a pattern of embryonic development during the pre-hatching stage, which has not been established in the living scalidophorans （priapulids, Ioriciferans and kinorhynchs）. Thus, it not only enriches our knowledge on the embryonic development of the extant descendants of Markuelia, but also opens a new window to the evolution and development of the animal.