基于来自中国和美国的新附属物,关于Caryosyntrips的新鲜信息
Xianfeng Yang1, Julien Kimmig2, Stephen Pates3
1Yunnan Key Laboratory for Palaeobiology, Institute of Palaeontology, Yunnan University, 650500, Kunming, Yunnan, China; MEC International Joint Laboratory for Palaeobiology and Palaeoenvironment, Yunnan University, 650500, Kunming, Yunnan, China.
Arthropod structure & development
|May 1, 2025
概括
两个新的化石发现扩大了放射性属Caryosyntrips的已知范围. 这些坎布里亚化石扩展了该属.
科学领域:
- 古生物学的古生物学
- 坎布里亚生物分层学.
- 海洋关节动物的进化 海洋关节动物的进化
背景情况:
- 卡里奥辛特里普斯是一种罕见的,寿命长的放射性牙科属,地理分布广泛.
- 以前的发现主要来自北美沉积物 (从Wuliuan到Drumian) 和一个来自冈德瓦纳 (4期) 的沉积物.
- 该属的时间范围以前从坎布里亚阶段4到德鲁米亚建立.
研究的目的:
- 描述两个新发现的Caryosyntrips标本.
- 扩大Caryosyntrips属已知的地理和时间分布.
- 调查Caryosyntrips物种内部潜在的物种内变异,并讨论功能形态和生态.
主要方法:
- 描述和分析归因于Caryosyntrips的化石附属物.
- 从马龙生物群 (中国) 和斯宾斯页岩成员 (美国) 的标本的古生物学检查.
- 与现有的Caryosyntrips化石记录进行比较分析,以评估分类学和进化方面的影响.
主要成果:
- 发现一个C. cf. 在中国,Caryosyntrips serratus附属物来自坎布里亚期第3阶段,这是亚洲首次出现.
- 美国犹他州Wuliuan (Miaolingian) 的新标本的鉴定,该标本表现出多种物种的特征.
- 新的发现将该属的时间范围扩展到坎布里亚期第3阶段,并显著扩大其地理分布.
结论:
- 在坎布里亚期第3阶段发现的Caryosyntrips扩大了该属的时间范围.
- 中国首次出现Caryosyntrips,显著扩大了其已知的地理范围.
- 犹他州的新标本表明,以前定义的物种特征可能代表物种内变异,需要进一步的化石证据来确认.
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