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Cruz and Hetherington identify that fiddleheads, a characteristic feature of ferns, evolved over 315 million years ago and are a synapomorphy of marattioid and leptosporangiate ferns. Their research highlights the presence of a tetrahedral apical cell in the fossilized fern Ankyropteris corrugata, supporting the idea that fern leaves evolved from shoots. The study concludes that the structure and development of fiddleheads have been highly conserved in circinatophytes, reinforcing the telome theory of fern

Author

sillysun16

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EN