Barbosa, Catarina, Pedro Correia, João Muchagata, Rúben Domingos, and Artur A. Sá. 2022. “Phyllotheca Douroensis Sp. nov., a New Equisetalean Fossil-Species from the Douro Carboniferous Basin (Upper Pennsylvanian; NW Portugal): Palaeobiogeographical, Systematic and Evolutionary Implications”. Biosis: Biological Systems 3 (1):e001. https://doi.org/10.37819/biosis.003.01.0162.