Charistes
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A type of coelenterate tabular coral. It flourished from the Ordovician to Silurian periods, and fossils are found in large numbers in limestone from that period. Along with Favosites, it is an important index fossil worldwide. The coral is long and tubular, and many of them gather together to form chain-like colonies, so it is also called chain coral. Source : Heibonsha Encyclopedia About MyPedia Information |
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腔腸(こうちょう)動物床板サンゴの一つ。オルドビス紀〜シルル紀に栄え，化石はその時代の石灰岩にかなり多く産する。ファボシテスとともに世界的に示準化石として重要。サンゴ虫は長管状で，たくさん集まって鎖のような群体をつくるため，クサリ（鎖）サンゴとも呼ばれる。
出典 株式会社平凡社百科事典マイペディアについて 情報 |
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