大きな赤ちゃんじゃない

Andrew A Farke¹

¹Raymond M. Alf Museum of Paleontology, The Webb Schools, Claremont, CA, USA.

Science (New York, N.Y.)

|January 15, 2026

まとめ

ナノティラノスの化石をめぐる議論は新しい研究によって解決されました恐竜の進化におけるその位置づけを明確にする科学的なアプローチが多々あります

科学分野:

古生物学
脊椎動物学
進化生物学

背景:

ナノティランヌス・ランセンシスの分類的地位は古生物学における長年の論争である.
過去の研究では異なる種やティラノサウルス・レックスの幼生形態としての妥当性について矛盾する解釈がなされた.

研究の目的:

ナノティランヌス・ランセンシスの化石をめぐる分類論の解決に
ナノティラノスの妥当性と遺伝的位置に関する科学的コンセンサスを確立する.

主な方法:

比較骨科,組織学分析,遺伝学的な分類を組み合わせた多角的なアプローチを用いた.
骨の微細構造と頭蓋骨の形状の詳細分析を含む,ナノティランヌスに起因する重要な化石標本を調べた.

主要な成果:

複数の調査から得られた証拠は,ナノティラノスが別々の属と種であることを支持している.
ヒストロジカルデータによると成人型の成長パターンはティラノサウルス・レックスと一致しない
形態学的比較により,他のティラノサウリドと区別するユニークな特徴が明らかになった.

結論:

化石の種であるナノティラヌス・ランセンシスは別々の分類体として確認されている.
この解明はティラノサウルスの多様性と進化史を明らかにします

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