独特に保存された腸内物質は,トライロビットの古生理学を明らかにします
Petr Kraft1, Valéria Vaškaninová1, Michal Mergl2
1Institute of Geology and Palaeontology, Charles University, Prague, Czech Republic.
Nature
|September 27, 2023
まとめ
この研究により トリロビット化石の 腸内詳細が初めて明らかになり 石灰岩の貝殻を大量に食べていた証拠が 明らかになりました この発見は 古代の海洋性関節足の 古生物学と消化過程に 新たな洞察を与えてくれます
科学分野:
- 古生物学
- 海洋生物学
- 進化生物学
背景:
- トリロバイトは様々な種類の海洋性関節動物で,正確な食事は不明でした.
- 以前の食事の推論は 形態学や化石の痕跡のような間接的な証拠に 基づいていました
- 腸内部が保存されたトリロビット標本については,これまで記述されていなかった.
研究 の 目的:
- トリロバイトの腸内物質の 最初の直接的な証拠を提示するために
- オードビキアン・トリロビットの 食生活と消化機能を再構築する
- トリロビットの消化管の 古代環境を調査する
主な方法:
- 三次元保存 トリロビット化石 (Bohemolichas incola) のシリコン状のノードル
- 内部構造の高解像度可視化のためのシンクロトロンマイクロトモグラフィー.
- 化石化した腸の詳細分析
主要な成果:
- ボヘモリカス・インコラの腸は 部分的に断片化した石灰岩の殻で満たされていて 高い餌の強度を示しています
- 殻の溶解が欠如していることは,中性からアルカリ性への消化環境を示唆しています.
- トリロビットの腸を避けていたので 有害な状態や消化が進行していることを示唆しています
結論:
- この研究はトリオビットの食事と消化過程の直接的な証拠を提供します.
- この発見は現代の甲殻類や ケリセラト類に似た 消化能力を示唆しています
- 腸内物質は,オルドビキア期の生態学的相互作用と古環境についての洞察を提供します.
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