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Carvalho, M. R., Wilf, P., Hermsen, E. J., Gandolfo, M. A., Cúneo, N. R. and Johnson, K. R. 2013. First record of Todea (Osmundaceae) in South America, from the early Eocene paleorainforests of Laguna del Hunco (Patagonia, Argentina). American Journal of Botany. Vol. 100(9), pp. 1831-1848.