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When do the earliest known Myrtales fossils date from?
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Myrtales
Common myrtle (Myrtus communis).
The earliest known evidence of the Myrtales order in the fossil record dates back to the Santonian Stage of the late Cretaceous Period, approximately 86.3 to 83.6 million years ago, based on reports of Myrtaceae pollen. Additionally, fossil flowers and fruits representing the order are well-documented from the Maastrichtian Stage (72.1 to 66.0 million years ago).1