Schmidt, A.R., L. Regalado, S. Weststrand, P. Korall, P., E.-M. Sadowski, H. Schneider, E. Jansen, J. Bechteler, M. Krings, P. Müller, B. Wang, X. Wang, J. Rikkinen, and L.J. Seyfullah. 2020. Selaginella was hyperdiverse already in the Cretaceous. New Phytologist 228(4): 1176-1182.
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