References
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Zhang, X., Wang, Y., Dilcher, D. L. & Manchester, S. R. (2020): Wireroadia, A new genus of winged fruit from the Cretaceous of Alabama and New England, USA. – International Journal of Plant Sciences 181(9): 898–910.
Manchester, S. R., Disney, K. A. & Pham, K. K. (2020): Winged fruits of rutaceous affinity from the Eocene of western North America. – Fossil Imprint 76(2): 211–21.
Kraft, P. & Kvaček, Z. (2017): Where the lycophytes come from? – A piece of the story from the Silurian of peri-Gondwana. – Gondwana Research 45: 180–190.
Álvarez-Vázquez, C. & Cleal, C. J. (2016): Wagneropteris minima, a new medullosalean pteridosperm from the middle Westphalian (Middle Pennsylvanian) of the Peñarroya-Belmez-Espiel Coalfield(Córdoba province, SE. Spain). – Spanish Journal of Palaeontology 31(1): 5–24.
Pott, C., Wang, X. & Zheng, X. (2015): Wielandiella villosa comb. nov. from the Middle Jurassic of Daohugou, China: More Evidence for Divaricate Plant Architecture in Williamsoniceae. – Botanica Pacifica. A journal of plant science and conservation 4(2): 137–148.
Friis, E. M., Pedersen, K. R. & Crane, P. R. (2014): Welwitschioid diversity in the Early Cretaceous: evidence from fossil seeds with pollen from Portugal and eastern North America. – Grana 53(online)(3): 175–196.