酸流体海绵形成了大约480万年前的礁石
Juwan Jeon1,2,3, Mar Simonet Roda4, Zhong-Yang Chen2,5
1Department of Earth and Environmental Sciences, Korea University, Seoul 02841, Republic of Korea.
概括
已知最古老的珊瑚礁构造者状海绵,Lophiostroma leizunia,在中国南部发现,可以追溯到4亿8千万年前. 这种古老的海绵利用酸来构建骨,这对于海绵来说是一个新的发现.
科学领域:
- 古生物学的古生物学
- 海洋生物学 海洋生物学
- 生物矿物化研究 生物矿物化研究
背景情况:
- 斯特罗马托类海绵是古生物学时期的关键珊瑚礁建造者,但它们的早期进化和生态作用尚不清楚.
- 了解早期的珊瑚礁生态系统对于破译像大奥尔多维纪生物多样化事件这样的重大进化事件至关重要.
研究的目的:
- 报告已知最古老的石类化石,Lophiostroma leizunia,来自中国南部.
- 调查早期石类动物的生物矿物化策略和珊瑚礁建设能力.
- 改进珊瑚礁进化和大奥尔多维纪生物多样化事件的时间表.
主要方法:
- 在中国南部,对4亿8千万年历史的岩层进行了平面图分析.
- 对化石Lophiostroma leizunia进行了详细的形态和骨分析.
- 生物矿物学分析以确定骨组成.
主要成果:
- 发现了Lophiostroma leizunia,这是已知的最古老的树类动物,可以追溯到上层特雷马多纪-下层弗洛伊纪 (约480万年前).
- L. leizunia形成了复杂的珊瑚礁结构,结合了各种各样的生物,并对框架结构做出了重大贡献.
- 这种化石独特地展示了一种以前在海绵中未知的酸骨,这证明了Porifera使用了二氧化,碳酸和酸.
结论:
- 这一发现使石类动物和珊瑚礁进化的化石记录提前了约2000万年,影响了对大奥尔多维纪生物多样化事件的理解.
- 莱兹尼亚的酸骨揭示了早期海绵中新的生物矿物化能力,这表明一种古老的遗传工具包用于各种矿物利用.
- 这些发现为生物矿物化的演变和早期动物主导的珊瑚礁生态系统提供了关键的见解.
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