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葉甲虫の放射線のタイミング:白紀末期から最近まで,葉甲虫のヒスパインがジンジャーに
P Wilf1, C C Labandeira, W J Kress
1Museum of Paleontology and Department of Geological Sciences, University of Michigan, Ann Arbor, MI 48109-1079, USA. pwilf@umich.edu
Science (New York, N.Y.)
|July 15, 2000
まとめ
化石の証拠によると,巻葉ヒスピンバケツは白亜紀後期に古代のジンジャーを食べ,その起源を2,000万年前に遡らせた. これは,古代の昆虫と植物の関係を明らかにし,白期の葉虫の多様性を強調しています.
科学分野:
- パレオントロジー・パレオントロジー
- エントモロジー エントモロジー学
- 植物学 植物学
背景:
- 昆虫と植物の相互作用の進化史は,共同進化のダイナミクスについての洞察を提供します.
- ヒスパインバブルス (クロイソメリダ科) は,特殊な食習慣を持つ多様な群れである.
- 昆虫の化石記録,特に白亜紀の記録は,進化のタイムラインを理解するために極めて重要です.
研究 の 目的:
- 巻き葉ヒスパイン虫の初期の進化史を調査する.
- ヒスパイン虫と生の植物の間の専門的な関連の古代を決定する.
- 葉虫クラード (Chrysomelidae) 内の適応放射線のタイミングを推論する.
主な方法:
- 化石化したジンジャー葉のステレオタイプ的な餌ダメージの文書化.
- 最新の白亜紀と初期のエオセンの時代の化石標本の分析.
- 化石の証拠を現存するヒスパイン虫の多様性と生の原型と比較.
主要な成果:
- ステレオタイプ的な餌ダメージは,白亜紀後期と初期エオセンのジンジャー葉で見つかった巻き葉ヒスパイン虫にのみ起因する.
- この化石の証拠は,ヒスパイン・ビートルズが,これまで遺体の化石が示唆していたよりも少なくとも2千万年前に進化したことを示している.
- この発見は,ヒスパイン虫と生科 (Zingiberales) の間の古代的で進化的に安定した関連性を確認しています.
結論:
- クレータ紀後期にヒスピンバケツから派生したバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツバケツ
- これらの放射線は,初期の草や生を含むアニオスペルムの宿主の急速な進化に並行した可能性が高い.
- この研究は,ヒスパイン虫の進化と,その特殊な草食性について,はるかに古いタイムラインを確立している.
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