Toward creation of Chemical paleontology

很难调查化石的起源，其结构非常常见或没有现代的形态学基础上的等价物。埃迪卡拉纪中的球状化石是起源于最古老的动物胚胎，还是起源于定居的大型细菌，目前仍存在争议。我们对最古老的动物胚胎化石进行了原位红外光谱分析，发现了真核生物即后生动物的有机分子证据。我们对最古老的刺胞动物息肉化石进行了同步辐射X射线显微CT分析，以观察其内部结构。结果表明，早期刺胞动物体内存在明显的五向放射状结构，表明早期刺胞动物体内不存在放射状结构，而是存在双侧结构。

It is difficult to investigate the origins of fossils whose structures are very common or have no modern equivalents based on the morphology. Recently, it is controversial whether globular fossils in the Ediacaran originate from the oldest animal embryos or colonized large bacteria. We carried out in-situ FT-IR analyses of the oldest animal embryo fossils and found organic molecular evidence for the eukaryotes, namely metazoans. We conducted synchrotron X-ray Micro-CT analyses of the oldest cnidarian polyp fossils to observe the internal structures. We found clear pentaradial structures inside, suggesting the early Cnidaria did not have radial structures but bilateral structures.