来自南极洲上白纪的第一个鱼鱼
Valéria Gallo1, Francisco J de Figueiredo2, Arthur Souza Brum3
1Departamento de Zoologia, Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil. gallo@uerj.br.
Scientific reports
|August 11, 2025
概括
在南极洲发现了一种新的化石鱼,Antarctichthys longipectoralis,它代表了最古老和最南端的Dercetidae鱼类. 这一发现揭示了早期Aulopiformes的新解剖细节,包括一个意想不到的体质联系.
科学领域:
- 古生物学的古生物学
- 鱼类学 鱼类学 鱼类学
- 海洋生物学 海洋生物学
背景情况:
- 类鱼是一种多样化的海洋鱼类类,其化石记录从白纪早期延伸到现在.
- 以特定的骨特征而闻名的Dercetidae家族主要记录在北半球和南美洲.
研究的目的:
- 为了描述一个新的属和物种 Aulopiformes, Antarctichthys longipectoralis,从南极洲.
- 为了阐明早期的进化历史和Aulopiformes,特别是Dercetidae的解剖学多样性.
主要方法:
- 微型计算机断层扫描 (microCT) 扫描一个三维保存的化石标本.
- 遗传学分析以确定新物种的进化关系.
主要成果:
- 发现了南极长 (Antarctichthys longipectoralis gen. et sp.) 的发现 nov. 来自南极洲晚期的坎帕尼亚.
- 识别独特的解剖特征,包括一个意想不到的耳部连接和没有牙的长长的胸.
- 新物种作为Rhynchodercetis和Hastichthys的姐妹属的遗传学定位.
结论:
- 南极长 (Antarctichthys longipectoralis) 代表了Dercetidae最南端的发生,扩大了这个家族已知的地理范围.
- 化石提供了对神经部解剖学和Aulopiformes早期多样化的关键见解.
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