长海 stingray ecomorph的进化起源
Giuseppe Marramà1, Eduardo Villalobos-Segura2, Roberto Zorzin3
1Dipartimento di Scienze della Terra, Università degli Studi di Torino, Via Valperga Caluso 35, 10125 Turin, Italy.
Palaeontology
|August 3, 2023
概括
化石刺鱼的化石揭示了从盆地到海底生物的生活方式和特殊饮食的进化转变. 这一发现澄清了durophagy和 pelagic stingray ecomorph的起源.
科学领域:
- 古生物学的古生物学
- 进化生物学 进化生物学
- 海洋生物学 海洋生物学
背景情况:
- 进化上的新奇事物源于新的身体计划,使得利用新的息地和资源成为可能.
- 在整个进化历史上,海洋鱼类一再殖民海环境.
- 刺鱼 (Myliobatiformes) 已知有毒的尾巴刺痛,并假设从 benthic 到 pelagic 的生活方式和饮食过渡.
研究的目的:
- 为了研究息地转移和鱼的食专业化的宏观进化模式.
- 为了澄清鱼中durophagy和 pelagic生活方式的进化起源.
- 提出一种关于水类生态形态的早期演变的情景.
主要方法:
- 分析了一种新的化石鱼,Dasyomyliobatis thomyorkei,来自意大利博尔卡的Eocene Konservat-Lagerstätte.
- 检查化石的形和衍生性特征的马赛克.
- 遗传学分析以确定化石的茎位置.
主要成果:
- 这种化石呈现出地鱼和其衍生品水类鱼之间的中间体型.
- 这幅马赛克支持新分类的干系遗传位置.
- 这些发现表明,水类的身体结构与类的祖先的水式生活方式一起演变.
结论:
- 水类生态形态动物很可能是在鱼历史的早期发展起来的.
- 过渡涉及从软猎物食转向软猎物食的转变.
- 这种进化轨迹为利用新的生态提供了适应优势.
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