acritarchs
microfossils of uncertain origin
The holotype of the acritarch Papillomembrana (which was the first Ediacaran acanthomorph to be discovered, back in 1963). Image credit: P. Adamson.
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The holotype of the acritarch Papillomembrana (which was the first Ediacaran acanthomorph to be discovered, back in 1963). Image credit: P. Adamson.
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