四射珊瑚 [
sì shè shān hú]
[古生] tetracoral
- 提出扬子区是奥陶纪、志留纪四射珊瑚的起源中心。
t is proposed that the Yangtze region may be a center of origin of Ordovician and Silurian rugose corals. - 二叠纪末,四射珊瑚、横板珊瑚、筳类、三叶虫全都绝灭;
At the end of the Permian, Wang plate corals, like Ting, trilobites are extinct; - 扬子区中奥陶世—志留纪兰多维利世四射珊瑚产出丰富,尤以兰多维利世最为繁盛。
The Middle Ordovician Llandovery rugose corals are abundant in the Yangtze region, especially in the Early Silurian.
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