Happy We still don’t know how Radiodonts reproduced, but it probably started (at least in some species) during mass-moulting events, when large numbers of them got together to moult. See fossils of for example. (1/2)

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Meet Cambroraster, a new Hurdiid from the Marble Canyon region in close proximity to the Burgess Shale. This animal is... incredibly weird, even for a Hurdiid. It had a tiny body, a giant, spiked head shield, and very strange appendages.

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