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Álvarez-Vázquez, C. y Cleal, C.J. 2020. Wagneropteris minima, a new medullosalean pteridosperm from the middle Westphalian (Middle Plennsylvanian) of the Peñarroya-Belmez-Espiel Coalfield (Córdoba province, SW Spain). Spanish Journal of Palaeontology. 31, 1 (abr. 2020), 5–24. DOI:https://doi.org/10.7203/sjp.31.1.17119.