One of the world’s most important plant families has a history extending much farther south than any live or fossil specimen previously recorded, as shown by chinquapin fruit and leaf fossils unearthed in Patagonia, Argentina, according to researchers.

Discovery photo of the mature Castanopsis fruiting spike fossil with four nuts enclosed in scaly cupules,
showing the part and counterpart on the split surface at Laguna del Hunco…

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Source: archeo