Abstract
A new fern species, Athyrium aberrans (Athyriaceae), currently only known from southeastern Xizang, China is described. Morphologically, A. aberrans is superficially similar to A. falcatum in the habit and pinna shape, but the new species can easily be distinguished from the latter by having purplish petioles and rachises, a bulbil on the rachis below the lamina apex, and finely toothed pinna margins. A phylogenetic analysis based on five plastid markers demonstrates that A. aberrans is most closely related to but obviously distinct from A. epirachis.
References
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<p>Wu, Z.-Y. (1983) <em>Flora Xizangica Vol.1</em>. Science Press, Beijing.</p>
<p>Zhang, L.-B., Comes, H.P. & Kadereit, J.W. (2001) Phylogeny and quaternary history of the European montane/alpine endemic <em>Soldanella</em> (Primulaceae) based on <em>ITS</em> and <em>AFLP</em> variation. <em>American Journal of Botany </em>88: 2331–2345. https://doi.org/10.2307/3558393</p>
<p>Zhang, X.-C. (1997) Additions to the pteridophyte flora of Xizang. <em>Indian Fern Journal </em>14: 99–102.</p>
<p>Zhang, X.-C., Shen, Z.-H. & Dong, S.-Y. (2004) Additions to the pteridophyte flora of Xizang (II). <em>Bulletin of Botanical Research </em>24: 274–277.</p>
<p>Zhang, X.-C., Wang, L. & Qi, X.-P. (2008) Additions to the pteridophyte flora of Xizang (IV). <em>Newsletter of Himalayan Botany </em>41: 15–22.</p>
<p>Beddome, R.H. (1863) <em>The ferns of southern India : being descriptions and plates of the Madras presidency</em>. Adelphi Press, Madras. https://doi.org/10.5962/bhl.title.119559</p>
<p>Beddome, R.H. (1892) <em>Handbook to the ferns of British India, Ceylon and the Malay peninsula: with supplement</em>. Thacker, Spink, and Co., Calcutta. https://doi.org/10.5962/bhl.title.49551</p>
<p>Ching, R.-C. & Ling, Y.-X. (1984a) A supplement to the Flora of Xizang (Tibet) (1). <em>Acta Pytotaxonomica Snica </em>22: 193–204.</p>
<p>Ching, R.-C. & Ling, Y.-X. (1984b) A supplement to the Flora of Xizang (Tibet) (2). <em>Acta Pytotaxonomica Snica </em>22: 397–408.</p>
<p>Christ, H. (1905) Les collections de Fougères de la Chine au Muséum ďhistoire naturelle de Paris. <em>Bulletin de la Société Botanique de France </em>1: 1–69. https://doi.org/10.1080/00378941.1905.10829209</p>
<p>Christensen, C. (1934) <em>Index Filicum–Supplementum tertium (1917–1933)</em>. H. Hagerup, Copenhagen.</p>
<p>Fan, X.-P., Zhang, L., Zhang, L.-B. & Zhang, L. (2021) <em>Selliguea wusugongii</em> (Polypodiaceae), a new fern species from southeastern Xizang, China based on morphological and molecular evidence. <em>Phytotaxa </em>480: 57–68. https://doi.org/10.11646/phytotaxa.480.1.5</p>
<p>Hall, T.A. (1999) BioEdit: a user-friendly biological sequence alignment editor and analysis program for Windows 95/98/NT. <em>Nucleic acids symposium series </em>41: 95–98.</p>
<p>Huelsenbeck, J.P. & Ronquist, F. (2001) MRBAYES: Bayesian inference of phylogenetic trees. <em>Bioinformatics </em>17: 754–755. https://doi.org/10.1093/bioinformatics/17.8.754</p>
<p>Johnson, M., Zaretskaya, I., Raytselis, Y., Merezhuk, Y., McGinnis, S. & Madden, T.L. (2008) NCBI BLAST: a better web interface.<em> Nucleic Acids Research</em> 36: W5–W9. https://doi.org/10.1093/nar/gkn201</p>
<p>Liu, Y.-C., Chiou, W.-L. & Kato, M. (2011) Molecular phylogeny and taxonomy of the fern genus <em>Anisocampium</em> (Athyriaceae). <em>Taxon </em>60: 824–830. https://doi.org/10.1002/tax.603014</p>
<p>Miller, M.A., Pfeiffer, W. & Schwartz, T. (2010) Creating the CIPRES Science Gateway for inference of large phylogenetic trees. <em>In: Proceedings of the Gateway Computing Environments Workshop (GCE), 14 November 2010. </em>New Orleans, LA, pp. 1–8. https://doi.org/10.1109/GCE.2010.5676129</p>
<p>Moore, T. (1857) <em>Index Filicum, a synopsis with characters of the genera, and an enumeration of the species of ferns, with synonyms, references, etc.</em> W. Pamplin, London, 168 pp. https://doi.org/10.5962/bhl.title.55301</p>
<p>Nakai, T. (1930) Notulae ad Plantas Japoniae & Koreae XXXVIII. <em>Botanical Magazine, Tokyo </em>44: 7–40. https://doi.org/10.15281/jplantres1887.44.7</p>
<p>Newman, E. (1851) Proposed addition of three new species and three new genera to our list of British ferns. <em>Phytologist </em>4: 368–371.</p>
<p>Roth, A.W. (1800) <em>Tentamen florae Germanicae; continens enumerationem plantarum in Germania sponte nascentium</em> (Tomus III). In Bibliopolio I.G. Mlleriano, Lipsiae, 578 pp.</p>
<p>Stamatakis, A., Hoover, P. & Rougemont, J. (2008) A rapid bootstrap algorithm for the RAxML Web servers. <em>Systematic Biology </em>57: 758–771. https://doi.org/10.1080/10635150802429642</p>
<p>Sun, H. & Zhou, Z.-K. (1996) The characters and origin of the flora from the big bend gorge of Yalutsangpu (Brahmabutra) river, eastern Himalyas. <em>Acta Botanica Yunnanica </em>18: 185–204.</p>
<p>Swartz, O. (1801) Genera et species filicum ordine systematico redactarum. <em>Journal für die Botanik. H. A. Schrader, Göttingen </em>1800 (2): 1–120.</p>
<p>Wei, H.-J., Zhou, X.-L., Jin, D.-M. & Yan, Y.-H. (2018a) New records of pteridophytes in Xizang. <em>Guihaia </em>38: 397–407.</p>
<p>Wei, R., Ebihara, A., Zhu, Y.-M., Zhao, C.-F., Hennequin, S. & Zhang, X.-C. (2018b) A total-evidence phylogeny of the lady fern genus <em>Athyrium</em> Roth (Athyriaceae) with a new infrageneric classification. <em>Molecular Phylogenetics and Evolution </em>119: 25–36. https://doi.org/10.1016/j.ympev.2017.10.019</p>
<p>Wu, Z.-Y. (1983) <em>Flora Xizangica Vol.1</em>. Science Press, Beijing.</p>
<p>Zhang, L.-B., Comes, H.P. & Kadereit, J.W. (2001) Phylogeny and quaternary history of the European montane/alpine endemic <em>Soldanella</em> (Primulaceae) based on <em>ITS</em> and <em>AFLP</em> variation. <em>American Journal of Botany </em>88: 2331–2345. https://doi.org/10.2307/3558393</p>
<p>Zhang, X.-C. (1997) Additions to the pteridophyte flora of Xizang. <em>Indian Fern Journal </em>14: 99–102.</p>
<p>Zhang, X.-C., Shen, Z.-H. & Dong, S.-Y. (2004) Additions to the pteridophyte flora of Xizang (II). <em>Bulletin of Botanical Research </em>24: 274–277.</p>
<p>Zhang, X.-C., Wang, L. & Qi, X.-P. (2008) Additions to the pteridophyte flora of Xizang (IV). <em>Newsletter of Himalayan Botany </em>41: 15–22.</p>