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Sentence

フデイシ綱こうは古こ生せい代だいの示し準じゅん化か石せきとして重じゅう要ようである。

Span Details

フデイシ綱こう

Graptolithina (extinct class of hemichordates)

古こ生せい代だい

Paleozoic era

noun, no-adjective

possession, attribution, nominalizer, or nominal linker

示し準じゅん化か石せき

index fossil; guide fossil

as; in the role of

重じゅう要よう

important; essential; significant