Abstract
A new fern species, Asplenium coronatum (Aspleniaceae), endemic to the Atlantic Forest is described. This species belongs to the Asplenium serratum complex, which comprises species that have simple, entire laminae with free veins ending near the margin and no marginal vein. Asplenium coronatum is distinguished from A. serratum by its large scales, which are often more than 20 mm long and have regularly thick cell walls, and laminae with an irregular, entire to slightly crenulate margin and acute to acuminate-caudate apex, commonly bearing a proliferous tip.
References
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<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">PPG I (2016) A community-based classification for extant ferns and lycophytes. <em>Journal of Systematics and Evolution</em> 54: 563–603. https://doi.org/10.1111/jse.12229 </span></span></span></p>
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<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Sylvestre, L.S., Costa, T.V. & Lino, V (2022) Aspleniaceae in Flora e Funga do Brasil. Jardim Botânico do Rio de Janeiro. Available from: https://floradobrasil.jbrj.gov.br/FB90671 (accessed 1 June 2022)</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Thiers, B. (2022 [continuously updated]) Index Herbariorum: A global directory of public herbaria and associated staff. New York Botanical Garden‘s Virtual Herbarium. Available from: http://sweetgum.nybg.org/science/ih/ (accessed 25 May 2022)</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Tryon, A.F. & Lugardon, B. (1991) <em>Spores of the Pteridophyta.</em> Springer-Verlag, New York, 156 pp. https://doi.org/10.1007/978-1-4613-8991-0</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Tryon, R.M. & Tryon, A.F. (1982) <em>Ferns and allied plants: with special reference to tropical America.</em> Springer-Verlag, New York, 857 pp. https://doi.org/10.1007/978-1-4613-8162-4</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Wagner, W.H. (1954) Reticulate evolution in the Appalachian <em>Asplenium</em>. <em>Evolution</em> 8: 103–118. https://doi.org/10.2307/2405636</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Wetzel, M.L.R., Sylvestre, L., Barros, C. & Vieira, R.C. (2017) Vegetative Anatomy of Aspleniaceae Newman from Brazilian Atlantic rainforest and its application in taxonomy. <em>Flora</em> 233: 118–126. https://doi.org/10.1016/j.flora.2017.05.010</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Xu, K.W., Zhang, L., Rothfels, C., Smith, A., Viane, R., Lorence, D., Wood, K., Chen, C.W., Knapp, R., Zhou, L., Lu, N.T., Zhou, X.M., Wei, H.J., Fan, Q., Chen, S.F., Cicuzza, D., Gao, X.F. & Zhang, L.B. (2020) A global plastid phylogeny of the fern genus Asplenium (Aspleniaceae). <em>Cladistics</em> 36: 22–71. https://doi.org/10.1111/cla.12384</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Yatabe, Y., Shinohara, W., Matsumoto, S. & Murakami, N. (2009) Patterns of hybrid formation among cryptic species of bird-nest fern, <em>Asplenium nidus</em> complex (Aspleniaceae), in West Malesia. <em>Botanical Journal of the Linnean Society</em> 160: 42–63. https://doi.org/10.1111/j.1095-8339.2009.00964.x</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Dyer, R.J., Savolainen, V. & Schneider, H. (2012) Apomixis and reticulate evolution in the <em>Asplenium monanthes</em> fern complex. <em>Annals of Botany (Oxford)</em> 110: 1515–1529. https://doi.org/10.1093/aob/mcs202</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Hieronymus, G. (1908) Plantae Stübelianae. Pteridophyta. Von Dr. Alphons Stuebel auf seinen Reisen nach Südamerika besonders in Colombien, Ecuador, Peru und Bolivien gesammelte Pteridophyten (Gefäβkryptogamen). <em>Hedwigia</em> 47: 204–249.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">IUCN (2022) Guidelines for Using the IUCN Red List Categories and Criteria. Version 15.1. Prepared by the Standards and Petitions Committee. Available from: https://www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed 27 October 2022)</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Lellinger, D.B. (2002) A modern multilingual glossary for taxonomic pteridology. <em>Pteridologia</em> 3: 1–263. https://doi.org/10.5962/bhl.title.124209</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Linnaeus, C. (1753) <em>Species Plantarum</em> 2. L. Salvius, Stockholm, 1200 pp.</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Prado, J., Sylvestre, L.S., Labiak, P.H., Windisch, P.G., Salino, A., Barros, I.C.L., Hirai, R.Y., Almeida, T.E., Santiago, A.C.P., Kieling-Rubio, M.A., Pereira, A.F. de N., Øllgaard, B., Ramos, C.G.V., Mickel, J.T., Dittrich, V.A.O., Mynssen, C.M., Schwartsburd, P.B., Condack, J.P.S., Pereira, J.B.S. & Matos, F.B. (2015) Diversity of ferns and lycophytes in Brazil. <em>Rodriguésia</em> 66: 1073–1083. https://dx.doi.org/10.1590/2175-7860201566410</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">PPG I (2016) A community-based classification for extant ferns and lycophytes. <em>Journal of Systematics and Evolution</em> 54: 563–603. https://doi.org/10.1111/jse.12229 </span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Schneider, H., Russell, S.J., Cox, C.J., Bakker, F., Henderson, S., Gibb, M. & Vogel, J.C. (2004) Chloroplast phylogeny of asplenioid ferns based on <em>rbcL</em> and <em>trnL-F</em> spacer sequences (Polypodiidae, Aspleniaceae) and its implications for the biogeography. <em>Systematic Botany</em> 29: 260–274. https://doi.org/10.1600/036364404774195476</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Suissa, J.S., Sundue, M.A. & Testo, W.L. (2021) Mountains, climate and niche heterogeneity explain global patterns of fern diversity. <em>Journal of Biogeography</em> 48 (6): 1296–1308. https://doi.org/10.1111/jbi.14076</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Sylvestre, L.S., Costa, T.V. & Lino, V (2022) Aspleniaceae in Flora e Funga do Brasil. Jardim Botânico do Rio de Janeiro. Available from: https://floradobrasil.jbrj.gov.br/FB90671 (accessed 1 June 2022)</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Thiers, B. (2022 [continuously updated]) Index Herbariorum: A global directory of public herbaria and associated staff. New York Botanical Garden‘s Virtual Herbarium. Available from: http://sweetgum.nybg.org/science/ih/ (accessed 25 May 2022)</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Tryon, A.F. & Lugardon, B. (1991) <em>Spores of the Pteridophyta.</em> Springer-Verlag, New York, 156 pp. https://doi.org/10.1007/978-1-4613-8991-0</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Tryon, R.M. & Tryon, A.F. (1982) <em>Ferns and allied plants: with special reference to tropical America.</em> Springer-Verlag, New York, 857 pp. https://doi.org/10.1007/978-1-4613-8162-4</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Wagner, W.H. (1954) Reticulate evolution in the Appalachian <em>Asplenium</em>. <em>Evolution</em> 8: 103–118. https://doi.org/10.2307/2405636</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Wetzel, M.L.R., Sylvestre, L., Barros, C. & Vieira, R.C. (2017) Vegetative Anatomy of Aspleniaceae Newman from Brazilian Atlantic rainforest and its application in taxonomy. <em>Flora</em> 233: 118–126. https://doi.org/10.1016/j.flora.2017.05.010</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Xu, K.W., Zhang, L., Rothfels, C., Smith, A., Viane, R., Lorence, D., Wood, K., Chen, C.W., Knapp, R., Zhou, L., Lu, N.T., Zhou, X.M., Wei, H.J., Fan, Q., Chen, S.F., Cicuzza, D., Gao, X.F. & Zhang, L.B. (2020) A global plastid phylogeny of the fern genus Asplenium (Aspleniaceae). <em>Cladistics</em> 36: 22–71. https://doi.org/10.1111/cla.12384</span></span></span></p>
<p align="justify"><span style="color: #000000;"><span style="font-family: Times New Roman, serif;"><span style="font-size: small;">Yatabe, Y., Shinohara, W., Matsumoto, S. & Murakami, N. (2009) Patterns of hybrid formation among cryptic species of bird-nest fern, <em>Asplenium nidus</em> complex (Aspleniaceae), in West Malesia. <em>Botanical Journal of the Linnean Society</em> 160: 42–63. https://doi.org/10.1111/j.1095-8339.2009.00964.x</span></span></span></p>