Abstract
A new species of fern, Pteris pseudoamoena (Pteridaceae), was identified and characterized. It is currently found in Guangxi Province, China, and Vietnam. Pteris pseudoamoena shares similar morphological characters with P. amoena and P. mcclurei, but can be distinguished by spores with echinate-tuberculate and auriculate ornamentation, straw-colored stipes, rachises and costae, and mostly free, occasionally interlinked veins. In addition, molecular evidence indicated that the new species is sister to a clade consisting of P. amoena, P. nakasimae and P. mcclurei.
References
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<p>Wang, X.-J., Wang, J.-M., Yang, D.-M., Wang, F.-G., Chen, H.-F. & Lang, Y.-T. (2019) Molecular systematics study on <em>Pteris fauriei</em> complex (Pteridaceae). <em>Guihaia</em> 39 (5): 581–589. https://doi.org/10.11931/guihaia.gxzw201803053</p>
<p>Yang, D.-M. (2011) <em>Systematic studies of Pteris (Pteridaceae) in China</em>. PhD Thesis, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou.</p>
<p>Zhang, G.-M., Liao, W.-B., Ding, M.-Y., Lin, Y.-X., Wu, Z.-H., Zhang, X.-C., Dong, S.-Y., Prado, J., Gilbert, M.G., Yatskievych, G., Ranker, T.A., Hooper, E.A., Alverson, E.R., Metzgar, J.S., Funston, A.M., Masuyama, S. & Kato, M. (2013) Pteridaceae.<em> In: </em>Wu, Z.-Y., Raven, P.H. & Hong, D.-Y. (Eds.) <em>Flora of China, Vols. 2-3, Pteridophytes. </em>Science Press, Beijing. Missouri Botanical Garden Press, St. Louis. pp. 169–256.</p>
<p>Zhang, L., Rothfels, C.J., Ebihara, A., Schuettpelz, E., Le Péchon, T., Kamau, P., He, H., Zhou, X.-M., Prado, J., Field, A., Yatskievych, G., Gao, X.-F. & Zhang, L.-B. (2015) A global plastid phylogeny of the brake fern genus <em>Pteris</em> (Pteridaceae) and related genera in the Pteridoideae. <em>Cladistics</em> 31 (4): 406–423. https://doi.org/10.1111/cla.12094</p>
<p>Zhang, L. & Zhang, L.-B. (2018) Phylogeny and systematics of the brake fern genus <em>Pteris</em> (Pteridaceae) based on molecular (plastid and nuclear) and morphological evidence. <em>Molecular Phylogenetics and Evolution</em> 118: 265–285. https://doi.org/10.1016/j.ympev.2017.09.011</p>
<p>Chao, Y.-S., Dong, S.-Y., Chiang, Y.-C., Liu, H.-Y. & Chiou, W.-L. (2012) Extreme multiple reticulate origins of the <em>Pteris cadieri </em>complex (Pteridaceae).<em> International Journal of Molecular Sciences</em> 13 (4): 4523–4544. https://doi.org/10.3390/ijms13044523</p>
<p>Ching, R.-C. (1933) <em>Pteris mcclurei</em>. <em>Bulletin of the Department of Biology, College of Science, Sun Yatsen University </em>6: 28.</p>
<p>Ebihara, A., Nitta, J.H. & Ito, M. (2010) Molecular species identification with rich floristic sampling: DNA barcoding the pteridophyte flora of Japan. <em>Plos One</em> 5 (12): e15136. https://doi.org/10.1371/journal.pone.0015136</p>
<p>IUCN (2012) <em>IUCN Red List Categories and Criteria, Version 3.1. 2 ed</em>. Gland, Switzerland and Cambridge, UK, 32 pp.</p>
<p>Li, C.-X., Lu, S.-G. & Yang, Q. (2004) Phylogenetics of <em>Pteris</em> (Pteridaceae) from China based on the chloroplast <em>trnL-F</em> intergenic space sequences. <em>Journal of Genetics and Molecular Biology </em>15 (1): 58–63.</p>
<p>Linnaei, C. (1753) <em>Pteris</em>.<em> In: Species Plantarum Vol. 2.</em> Holmiae, Impensis Laurentii Salvii, pp. 1073.</p>
<p>Ronquist, F. & Huelsenbeck, J.P. (2003) MrBayes 3: Bayesian phylogenetic inference under mixed models. <em>Bioinformatics</em> 19: 1572–1574. https://doi.org/10.1093/bioinformatics/btg180</p>
<p>Schuettpelz, E., Schneider, H., Huiet, L., Windham, M.D. & Pryer, K.M. (2007) A molecular phylogeny of the fern family Pteridaceae: assessing overall relationships and the affinities of previously unsampled genera. <em>Molecular Phylogenetics and Evolution</em> 44: 1172–1185. https://doi.org/10.1016/j.ympev.2007.04.011</p>
<p>Stamatakis, A. (2014) RAxML: a tool for phylogenetic analysis and post-analysis of large phylogenies. <em>Bioinformatics</em> 30: 1312–1313. https://doi.org/10.1093/bioinformatics/btu033</p>
<p>Tryon, R.M. & Tryon, A.F. (1982) <em>Pteris</em>.<em> In: Ferns and Allied Plants: with Special Reference to Tropical America</em>. Springer-Verlag, New York, pp. 332–341. https://doi.org/10.1007/978-1-4613-8162-4</p>
<p>Tryon, R.M., Tryon, A.F. & Kramer, K.U. (1990) Pteridaceae. <em>In:</em> Kramer, K.U. & Green, P.S. (Eds.) <em>The Families and Genera of Vascular Plants, Vol 1. Pteridophytes and Gymnosperms</em>. Springer-Verlag, Berlin, pp. 230–256. https://doi.org/10.1007/978-3-662-02604-5_42</p>
<p>Wang, Q.-X. & Yu, J. (2003) Classification of sore ornamentation in Filicales under SEM. <em>Acta Botanica Yunnanica</em> 25 (3): 313–320. https://doi.org/10.3969/j.issn.2095-0845.2003.03.006</p>
<p>Wang, X.-J., Wang, J.-M., Yang, D.-M., Wang, F.-G., Chen, H.-F. & Lang, Y.-T. (2019) Molecular systematics study on <em>Pteris fauriei</em> complex (Pteridaceae). <em>Guihaia</em> 39 (5): 581–589. https://doi.org/10.11931/guihaia.gxzw201803053</p>
<p>Yang, D.-M. (2011) <em>Systematic studies of Pteris (Pteridaceae) in China</em>. PhD Thesis, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou.</p>
<p>Zhang, G.-M., Liao, W.-B., Ding, M.-Y., Lin, Y.-X., Wu, Z.-H., Zhang, X.-C., Dong, S.-Y., Prado, J., Gilbert, M.G., Yatskievych, G., Ranker, T.A., Hooper, E.A., Alverson, E.R., Metzgar, J.S., Funston, A.M., Masuyama, S. & Kato, M. (2013) Pteridaceae.<em> In: </em>Wu, Z.-Y., Raven, P.H. & Hong, D.-Y. (Eds.) <em>Flora of China, Vols. 2-3, Pteridophytes. </em>Science Press, Beijing. Missouri Botanical Garden Press, St. Louis. pp. 169–256.</p>
<p>Zhang, L., Rothfels, C.J., Ebihara, A., Schuettpelz, E., Le Péchon, T., Kamau, P., He, H., Zhou, X.-M., Prado, J., Field, A., Yatskievych, G., Gao, X.-F. & Zhang, L.-B. (2015) A global plastid phylogeny of the brake fern genus <em>Pteris</em> (Pteridaceae) and related genera in the Pteridoideae. <em>Cladistics</em> 31 (4): 406–423. https://doi.org/10.1111/cla.12094</p>
<p>Zhang, L. & Zhang, L.-B. (2018) Phylogeny and systematics of the brake fern genus <em>Pteris</em> (Pteridaceae) based on molecular (plastid and nuclear) and morphological evidence. <em>Molecular Phylogenetics and Evolution</em> 118: 265–285. https://doi.org/10.1016/j.ympev.2017.09.011</p>