The enigmatic Ediacaran (late Precambrian) genus Rangea and related forms
The enigmatic Ediacaran (late Precambrian) genus Rangea and related forms
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DOI：
10.1017/s0094837300011635
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发表时间：
1985-07
期刊：
影响因子：
2.7
通讯作者：
R. Jenkins
中科院分区：
文献类型：
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作者：
R. Jenkins
Rangea Gürich（1929）是一种由重复的叶状元素组成的叶状化石，是最早发现的形式之一，属于现在广为人知的埃迪卡拉纪软体组合。Rangea与Pteridinium Gürich，1933和Ernietta Pflug，1966一起出现在纳米比亚（西南非洲）的纳马群的下部。利用与Wade建立的方法相似的方法，对Rangea的保存和结构进行调查（1968年，1971年），表明它可能是一个殖民珊瑚，由一个大的锥形初级水螅或卵虫，和一些叶状的，连接的叶状体，其中携带喂养水螅;它被认为属于埃迪卡拉纪早期的一组珊瑚虫，提供了仍然活着的Telestacea和Pennatulacea之间的化石联系。对Pteridinium和Ernietta的类似研究表明，它们的结构与Rangea不同，并且不支持它们与Rangea有关的想法。
The late Precambrian genus Rangea Gürich, 1929, a frond-like fossil composed of repeated foliate elements, is one of the first discovered forms belonging to the now widely known soft-bodied assemblages characterizing the Ediacaran Period. Rangea occurs together with the genera Pteridinium Gürich, 1933, and Ernietta Pflug, 1966, in the lower parts of the Nama Group, Namibia (South West Africa). Investigation of the preservation and structure of Rangea, utilizing a methodology similar to that established by Wade (1968, 1971), indicates that it was probably a colonial octocoral consisting of a large tapering primary polyp, or oozoid, and a number of leaf-shaped, conjoined fronds which bore the feeding polyps; it is suggested to belong to a group of early Ediacaran anthozoans which provide a fossil link between the still living Telestacea and Pennatulacea. Similar investigations of Pteridinium and Ernietta disclose that their structure is different from Rangea and does not support ideas that they are related to it.