%0 Journal Article %T Developmental sequence of Cambrian embryo Markuelia %A Xi-ping Dong %A
DONG %A XiPing %J 科学通报(英文版) %D 2007 %I %X 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 tomo-graphic 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, loriciferans 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. %K Cambrian %K fossil embryos %K Markuelia %K developmental sequence
寒武纪 %K 蠕虫 %K 化石胚胎 %K 发育序列 %K 两侧对称动物胚胎 %U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=A4487A7E1534DB836F2C5C8CFC9C3058&yid=A732AF04DDA03BB3&vid=286FB2D22CF8D013&iid=DF92D298D3FF1E6E&sid=0FBB0D015A3E9A88&eid=073C3CF5F13F64FE&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=0&reference_num=31