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Two types of fronds belonging to a new species, Drynaria dimorpha sp. nov., are described from the upper Pliocene Mangbang Formation in western Yunnan, southwestern China. The base frond is lobate and the lobes are incised up to 2/3 or more of the width. The foliage frond is preserved as individual fertile or sterile pinnae with serrated margin and constricted basal part. Circular sori are arranged...
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