Matoniaceae is one of the three families of ferns in the Gleicheniales order of the Polypodiopsida class. Fossil records reveal that Matoniaceae ferns were abundant during the Mesozoic era (about 250-million to 66-million years ago), during which they lived on every continent, including Antarctica, with eight genera and 26 species. Today the famil...
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http://en.wikipedia.org/wiki/Matoniaceae
family of ferns dating from the Mesozoic Era (roughly 250 million to 65 million years ago) and distinguished by an umbrella-shaped membranous ... [1 related articles]
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http://www.britannica.com/eb/a-z/m/49
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