MUSEUM QUALITY Yunnanozoon Chordate Precursor

Yunnanozoon lividum

Phylum Hemichordata

Geological Time: Early Cambrian (~525 million years ago)

Size (25.4mm=1 inch): Yunnanozoon fossil is 17 mm long (curve measure) on a 12 mm by 17 mm matrix

Fossil Site: Chengjiang Maotianshan Shales - Quiongzhusi Section, Yu’anshan Member, Heilinpu Formation, Jianshan Hill, Ercaicun Village, Haikou Town, Anning, Yunnan Province, China

Fossil Code: JH43

Price: Sold

Yunnanozoon lividumDescription: The highlight of this diminutive fossil plaque, Yunnanozoon lividum, has been designated as the earliest known hemichordate. Possessing many of the characteristic chordate features and providing an Yunnanozoon Fossil Art anatomical link between invertebrates and chordates, the Hemichordata is a minor but important phylum in evolutionary biology. It at one point Yunnanozoon was thought to be a member of the Phylum Chordata, but has been reassigned as mentioned above. This one comes from the Chengjiang deposits near Anning, Yunnan Province, China. As the earliest of the hemichordates, its study casts light upon the early evolution of both the chordates and the vertebrates that sprung from them as the story of life unfolded.

Also see: Chengjiang Biota Fauna List Chengjiang Fossils

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