将软体和三维化石结合起来,揭示了早期的lingulellotretid手足类动物的进化修饰
Feiyang Chen1,2, Zhifei Zhang3, Lars E Holmer4
1Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education, China University of Mining and Technology, Xuzhou, China. feiyang.chen@cumt.edu.cn.
Communications biology
|December 1, 2025
概括
独一无二的早期足动物,Lingulellotretids,在坎布里亚爆炸期间显示出从管状祖先的进化修饰. 尽管具有独特的特征,但它们灭绝了,与减少伪内部区域的主导lingulide趋势形成鲜明对比.
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:
- 现存的长舌类手足类被认为是进化上保守的,从坎布里亚时代以来形态变化最小.
- 早期足动物,特别是舌三足动物的解剖学和本体遗传学修饰仍未得到充分研究.
- 灵格列洛特类的特点是长长的脚孔和一个大的伪内部区域.
研究的目的:
- 描述坎布里亚纪2系列沉积物中的Lingulellotreta的软组织和酸.
- 为了研究lingulellotretids的进化修饰和灭绝.
- 为了分析lingulide手足足类动物的长期进化趋势.
主要方法:
- 精致保存的软组织和酸外的描述.
- 对形态特征与祖先形式进行比较分析.
- 考察中国和哈萨克斯坦的坎布里亚纪第2系列矿床的古生物学研究.
主要成果:
- 在Lingulellotreta的生物矿物化的新奇之处包括一个长长的伪内部区域,形成内脏腔和柱状外架构.
- 林格列洛特类动物很可能在坎布里亚爆炸期间从未矿化的管状祖先尤加诺提卡 (Yuganotheca) 进化.
- 在奥尔多维纪早期,Lingulellotretids灭绝了,这代表了一个短暂的进化实验.
结论:
- 自从坎布里亚早期以来,lingulide臂足动物表现出长期的伪内部区域减少趋势,朝着更高效的身体结构趋同.
- 灵类动物的进化变化很可能是由于骨防御能力的增强和食需求的增加所导致的.
- 这些适应在奥尔多维纪大生物多样化事件期间达到高潮,形成了类手足足类动物特有的舌头形体图.
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