Why there are no more ferns growing on earth?
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Ferns are one of the oldest groups of plants on Earth, with a fossil record dating back to the middle Devonian (383-393 million years ago) (Taylor, Taylor, and Krings, 2009). Recent divergence time estimates suggest they may be even older, possibly having first evolved as far back as 430 mya (Testo and Sundue, 2016).
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Hope it will useful for you.
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Pteridophyta is no longer recognised as a valid taxon because it is paraphyletic.
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