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形态进化和灭绝的eodiscids和agnostoid节足动物的进化和灭绝

Huarui Li¹, Tao Dai², Yanlong Chen¹

¹State Key Laboratory of Continental Dynamics, Shaanxi Key Laboratory of Early Life and Environments, Department of Geology, Northwest University, Xi'an 710069, China.

Life (Basel, Switzerland)

|January 25, 2025

概括

在坎布里亚纪系列2之后,Agnostoid节足动物的形态多样性呈现下降,与重要的地质和进化事件相吻合. 它们的灭绝是由于偶尔减少而导致的,而不是单一的原因.

科学领域:

古生物学的古生物学
进化生物学进化生物学
地质地质地质地质地质地

背景情况:

在显著的早期古老时代地质事件期间,存在了Agnostoid节足动物和eodiscids.
这些事件对无神体进化的影响尚不清楚.

研究的目的:

为了研究亚格诺斯类动物对早期古老时代地质事件的进化反应.
为了重建随着时间的推移而变异的形态空间占用和多样性.

主要方法:

几何形态测量被用来分析无神体化石.
为了追踪进化变化,重建了Morphospace的占用情况.

主要成果:

在坎布里亚纪系列2中,发生了最大的不可知性形态空间占用.
形态空间占有率的下降与主要的非生物和生物事件相关,包括Botoman-Toyonian Extinctions (BTEs),Redlichiid-Olenellid Extinction Carbon Isotope Excursion (ROECE),Drumian Carbon Isotope Excursion (DICE),Steptoean Positive Carbon Isotope Excursion (SPICE),以及大奥尔多维纪生物多样化事件 (GOBE).

结论:

无神体动物的灭绝是形态多样性逐渐减少的过程,而不是单一事件.
灭绝很可能是由多种因素的组合引起的,而不是单一的非生物或生物触发因素.

关键词:

在古老生态时期 (Paleozoic)无神论者们的说法灭绝机制的灭绝机制形态进化的形态演变.形态空间职业职业形态空间职业

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