Last Updated
：2025/12/07
Itaboraian
Proper noun
Japanese Meaning
地質学、古生物学の分野で用いられる用語で、Itaboraí層群を基準とする約5300万～5000万年前（初期始新世）の地質年代を指し、特に南アメリカの陸生哺乳類の時代区分（SALMA分類）において用いられる。
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(geology, paleontology) A geologic age, 53.0–50.0 mya and within the Ypresian (Early Eocene), whose stratotype is the Itaboraí Formation; used especially in the context of South American land mammal age (SALMA) classification.
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Itaboraian
Fossil assemblages from the Itaboraian beds reveal an important transition in early Eocene mammal evolution.
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Fossil assemblages from the Itaboraian beds reveal an important transition in early Eocene mammal evolution.
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