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The Coryphoideae is one of five subfamilies in the palm family, Arecaceae. It contains all of the genera with palmate leaves, excepting Mauritia, Mauritiella and Lepidocaryum, all of subfamily Calamoideae, tribe Lepidocaryeae, subtribe Mauritiinae. The subfamily comprises approximately 46 genera and more than 400 species, with members occurring across tropical, subtropical, and warm temperate regions worldwide, best known for their palmateor costapalmate (“fan”) leaves. Historically, this leaf form played a disproportionate role in palm classification, leading to the long-standing assumption t