Lower Cambrian phosphatized Punctatus from southern Shaanxi and their ontogeny sequence
Lower Cambrian phosphatized Punctatus from southern Shaanxi and their ontogeny sequence
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陕南下寒武统磷化斑鱼及其个体发育序列
DOI：
10.1007/s11434-007-0447-y
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发表时间：
2007-10-01
影响因子：
--
通讯作者：
Liu Zhu
中科院分区：
文献类型：
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作者：
Li Peng;Hua Hong;Liu Zhu
这些幼虫化石的个体发育还没有得到系统的研究，这主要是因为它们保存得不好，鉴定有限。宽川堡段以磷灰岩和硅质岩为主，产生磷化动物胚胎，特别是橄榄和斑点动物胚胎，其精细结构和不同个体发育阶段具有高分辨率。根据其从身体部位到口腔部位的发育转变，建立了斑点鱼的个体发育序列，这与Bengtson和Yue(1997)提出的胚胎个体发育序列完全一致。此外，还发现了一新属QuadRapyrgites Gen.11月被竖立起来以接收具有四放射体计划的幼虫。
Ontogeny of these larva fossils has not been systemically studied mainly due to their poor preservation and limited identification. The Kuanchuanpu Member, predominated by phosphorites and cherts, yields phosphatized animal embryos, particularly those of Olivooides and Punctatus which have high resolution in fine structures and different ontogeny developmental stages. An ontogenetic sequence of the Punctatus is established mainly base on its developmental transitions from body part to oral one, which is perfectly consistent with the embryonic ontogeny sequence proposed by Bengtson and Yue (1997). Furthermore, a new genus Quadrapyrgites gen. nov is erected to receive a larva with tetraradial body plan.