中世哺乳动物形态揭示了皮肤颜色的起源
在PubMed上查看摘要
概括
此摘要是机器生成的。中纪哺乳动物的亲属很可能有深棕色的毛皮,与羽毛恐龙不同. 这表明,在恐龙灭绝后,现代哺乳动物的快速多样化之前,均的色彩已经进化.
科学领域
- 古生物学
- 进化生物学
- 哺乳动物进化
背景情况
- 色对哺乳动物的进化至关重要,它影响着它们的行为,生理和息地.
- 中生时期的哺乳动物与恐龙共存,但它们的颜色在很大程度上是未知的.
- 黑色素, 含有黑色素的细胞器, 是决定头发颜色的关键.
研究的目的
- 为了重建六种中生代哺乳动物的颜色.
- 将中生代哺乳动物的黑色素体形态与现存的哺乳动物和恐龙进行比较.
- 了解哺乳动物色彩的演化轨迹.
主要方法
- 使用黑色素体形态的数据集.
- 在116种现存的哺乳动物中量化测量了毛发颜色.
- 重建了6种中生代哺乳动物的颜色,其中包括一种新的euharamiyidan物种.
主要成果
- 中生时期的哺乳动物表现出均的黑色素体几何体,显示出深棕色的颜色.
- 这种色彩与密码性和夜间性相一致.
- 黑色素变异和颜色多样性比现存的哺乳动物或羽毛恐龙少.
结论
- 中世哺乳动物可能具有深色,均的皮肤色.
- 在现存的哺乳动物中看到的黑色素和颜色的显著变化可能是在白纪-古纪灭绝事件后出现的.
- 这表明恐龙灭绝后哺乳动物的色彩多样性的主要进化辐射.
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