Halysites (English name)
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A genus of tabular coral that flourished in the Ordovician and Silurian periods. It is important as an index fossil. It grows in colonies that resemble chains. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
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オルドビス紀，シルル紀に繁栄した床板サンゴ類の一属。示準化石として重要。鎖を連ねたように群集し，成長する。
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