来自上白时期Menefee形成 (新墨西哥州,北美) 的修订后的乌组合,具有进化和古生物平流图学意义
Brent Adrian1, Heather F Smith1,2, Andrew T McDonald3
1School of Human Evolution and Social Change, Arizona State University, Tempe, Arizona, United States.
PeerJ
|April 28, 2025
概括
新的化石发现揭示了圣胡安盆地的坎帕尼亚海演变的洞察力. 这项研究扩大了层级图谱范围,并确定了新的标本,增强了对拉拉米迪亚晚白纪乌古生物层级图谱的理解.
科学领域:
- 古生物学的古生物学
- 脊椎动物古生物学 脊椎动物古生物学
- 在平流图学上,平流图学是平流图学.
背景情况:
- 中间的坎帕尼亚 Menefee 形成 (Fm.) 在圣胡安盆地是一个研究不足的陆地沉积物.
- 之前的研究发现了多样化的恐龙和鱼类动物群,但乌动物群仍未得到充分探索.
- 了解Menefee海的动物群对于拉拉米迪亚的坎帕尼亚古生物结构学至关重要.
研究的目的:
- 为了展示来自Menefee FM的海的新化石材料.
- 为了解科罗拉多高原在坎帕尼亚时期的乌进化提供了洞察力.
- 更新拉拉米迪亚地区坎帕尼亚海的古生物层级图谱范围.
主要方法:
- 分析从Menefee形成收集的新收集的乌化石材料.
- 将Menefee海的种类与拉拉米迪亚其他当代种类进行比较.
- 对乌多样性的集群分析,以评估省级性和特有性.
主要成果:
- 贝尼类动物 (Neurankylus baueri,Scabremys ornata) 和南基类动物 (Basilemys) 的扩大层级范围.
- 增加了海洛基化物 (Naomichelys) 和其衍生的贝尼德 (Denazinemys,Thescelus) 的代表性.
- 新的泛三基物种标本表明Adocus和其他三基物种/塑体物种的持久性.
- 集群分析表明,在一些乌群体中,度的省级性和盆地规模的特有性.
- 梅内菲海的动物群最接近瓦韦普海的动物群. 和Aguja Fm. 在线播放
结论:
- 梅尼菲海组合为拉拉米迪亚的坎帕尼亚古生物层学提供了关键数据.
- 化石分布表明某些乌类的度省级和潜在的特有性.
- 门尼菲动物群与西部内陆海道海岸线的古老环境重建相一致.
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