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For the final #FossilFriday of #Arachtober - and given it's nearly halloween - let's meet a fossil parasite! This beautiful tick was preserved in Eocene (~44–49 million year old) amber, and was reconstructed in 3D by using high resolution CT. Fossil left, digital render right.
In addition to those, they have appendages at the back to help them swim, and their body is sandwiched in between two shells which has made understanding their anatomy (and evolutionary relationships) a bit harder.
For #FssilFriday meet Bellinympha, a 135 million year old lacewing. This creature is not only gorgeous, but is especially cool because of the colour patterns preserved on its wings, which suggest mimicry of leaves, at a time before flowering plants evolved.