The Burgess Shale in British Columbia is a site of marine fossils that are 506 million years old. It is celebrated for its “weird wonders,” containing a…
This article was originally published on The Conversation, an independent and nonprofit source of news, analysis and commentary from academic experts. Disclosure information is available on the original site.The Burgess Shale is located in British Columbia and is a site of marine fossils that are 506 million years old. It is celebrated for its “weird wonders,” containing a treasure trove of astonishingly well-preserved fossils.
Smaller than the size of a human hand, Stanleycaris is shorter than the metre-long Anomalocaris, but no less odd-looking. The new fossils are also much better preserved, showing surprising features. Since arthropods make up roughly 85 per cent of living animal species, this is important for understanding the origin of much biodiversity.Article content
However, over the last decade this has begun to change with the discovery that some Cambrian deposits can occasionally preserve remains of nervous systems. Although so-called neuropaleontology is not without controversy, these discoveries have shed some light on the evolution of arthropod heads in early fossil groups.Owing to their early divergence in the arthropod group, radiodonts are well-positioned to help inform the ancestral traits of arthropods.
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