エジプトの上白亜紀のマングローブ埋蔵地から発見された巨大なサウロポッド恐竜
J B Smith1, M C Lamanna, K J Lacovara
1Department of Earth and Environmental Science, University of Pennsylvania, 240 South 33rd Street, Philadelphia, PA 19104-6316, USA. smithjb@sas.upenn.edu
まとめ
巨大なタイタノサウリドのサウロポッド,パラリタイタン・ストロメリ (Paralititan stromeri) が,エジプトのバハリア・フォーメーションで発見された. 異常な長さの腰骨は,クレタセオスの最大のサウロポッドの1つであり,おそらくマングローブの環境に住んでいたことを示唆しています.
科学分野:
- パレオントロジー・パレオントロジー
- 脊椎動物の古生物学について
- メソゾーイク時代 メソゾーイク時代
背景:
- エジプトのバハリア・フォーメーションは,セロポッドを含む大きな脊椎動物の化石を産むことで知られています.
- 1935年以降,この群れからテトラポッドの発見はほとんど報告されていない.
研究 の 目的:
- エジプトから新たに発見された巨大タイタノサウリドサウロポッド恐竜を記述するために.
- この発見の古生物学的および古環境的影響を分析する.
主な方法:
- 化石骨格の発掘と記述.
- 比較骨科は,既知のサウロポッド種と比較されています.
- 堆積物の堆積物に基づいた古環境再建.
主要な成果:
- 巨大タイタノサウルスのサウロポッドであるパラリタイタン・ストロメリの発見.
- パラリチタン・ストロメリ (Paralititan stromeri) の肩骨 (1.69メートル) は,クレタセオスのサウロポッドの中で最も長いものである.
- 骨格は本土のマングローブの堆積地に発見され,チタノサウルスとその捕食者がそのような環境を習慣的に使用している可能性があることを示しています.
結論:
- パラリチタン・ストロメリは,既知の白亜紀サウロポッドの多様性に大きく加えられています.
- この発見は,大型タイタノサウルスの捕食者と捕食者が沿岸のマングローブの生態系を頻繁に訪れた可能性があることを示唆している.
- この発見は,北アフリカにおけるクレタケイア期後半のチタノサウルスの古生態学と生息地の利用に関する新しい洞察を提供します.
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