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Sidneyia inexpectans

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Sidneyia

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Sidneyia - Wikipedia
https://en.wikipedia.org/wiki/Sidneyia
Sidneyia Sidneyia inexpectans
They Put the Bite in Trilobite - The New York Times
https://www.nytimes.com/2021/01/30/science/trilobites-shells-fossils.html
Cambrian period Horseshoe crabs Olenoides serratus Redlichia Redlichia rex Sidneyia inexpectans Trilobites