The lobopodian Paucipodia inermis from the Lower Cambrian Chengjiang fauna, Yunnan, China
The lobopodian Paucipodia inermis from the Lower Cambrian Chengjiang fauna, Yunnan, China
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DOI：
10.1080/00241160410006555
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发表时间：
2004-09-01
期刊：
影响因子：
1.5
通讯作者：
Bergström, J
中科院分区：
文献类型：
--
作者：
Hou, XG;Ma, XY;Bergström, J
报道了采自昆明海口澄江下寒武统的Paucipodia inermis新标本。澄江物质中以前没有发现的细节似乎是由早期成岩过程引起的。一些以前在古生代叶足动物中没有观察到的特征包括皮肌囊、体腔、肠道内容物、可能成对的腹神经节和带牙齿的锉或咬装置的细节。后者意味着一个根本的区别onychophorans和排除了古生代lobopodians祖先的位置。假设的尾巴被证明是头部，并且表明这种动物拥有九对叶足类动物，而不是最初所说的六对。Paucipodiidae n. fam.本文介绍
New specimens of Paucipodia inermis Chen, Zhou & Ramskold, 1995, are described from the Lower Cambrian Chengjiang Lagerstatte in Haikou, Kunming. Details not previously seen in the Chengjiang material appear to be caused by early diagenetic processes. Some features not previously observed in Palaeozoic lobopodians include details of the dermomuscular sac, body cavities, contents of the gut, possible paired ventral nerve ganglia, and a rasping or biting apparatus with teeth. The latter implies a fundamental difference from onychophorans and rules out an ancestral position for Palaeozoic lobopodians. The supposed tail is shown to be the head, and it is shown that this animal possessed nine pairs of lobopods rather than six, as originally stated. The family Paucipodiidae n. fam. is introduced.