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International audience; Phylogeny has long informed pteridophyte classification. As our ability to infer evolutionary trees has improved, classifications aimed at recognizing natural groups have become increasingly predictive and stable. Here, we provide a modern, comprehensive classification for lycophytes and ferns, down to the genus level, utilizing a community-based approach. We use monophyly as the primary criterion for the recognition of taxa, but also aim to preserve existing taxa and circumscriptions that are both widely accepted and consistent with our understanding of pteridophyte phylogeny. In total, this classification treats an estimated 11 916 species in 337 genera, 51 families, 14 orders, and two classes. This classification is not intended as the final word on lycophyte and fern taxonomy, but rather a summary statement of current hypotheses, derived from the best available data and shaped by those most familiar with the plants in question. We hope that it will serve as a resource for those wanting references to the recent literature on pteridophyte phylogeny and classification, a framework for guiding future investigations, and a stimulus to further discourse.

Key to the species of Campyloneurum from Dept. La Paz, Bolivia 1. Rhizome diameter 3���5 mm; rhizome scales usually> 1.5 mm wide; 2���5 series of areoles between costa and margin. ............................................................................................................................................................. C. amphostenon ��� Rhizome diameter 1���3 mm; rhizome scales usually 2 2. Rhizome scales narrowly ovate without differentiated margins, with wide oblong cells, the cell lumina iridescent.... .................................................................................................................................................................. C. aglaolepis ��� Rhizome scales linear-lanceolate with differentiated margins, with oblong or narrowly oblong cells, the cell lumina not iridescent................................................................................................................................................................. 3 3. Laminae shortly decurrent at the bases, abruptly ending in obtuse apices................................................. C. poloense ��� Laminae gradually ending in both ends, acute or acuminate....................................................................................... 4 4. Rhizome scale bases> 1 mm wide, scales brown in mass.................................................................. C. angustifolium ��� Rhizome scale bases C. angustipaleatum, Published as part of Le��n, Blanca & Kessler, Michael, 2013, Campyloneurum poloense (Polypodiaceae), a new combination and lectotypification for a Bolivian fern, pp. 59-60 in Phytotaxa 119 (1) on page 60, DOI: 10.11646/phytotaxa.119.1.7, http://zenodo.org/record/5079378