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Issue: Vol. 666 No. 1: 26 Sept. 2024
Type: Article
Published: 2024-09-26
DOI: 10.11646/phytotaxa.666.1.5
Page range: 51-58
Abstract views: 115
PDF downloaded: 11

Dicranum nepalense (Dicranaceae, Dicranales), a new species with fragile leaves from Nepal Himalayas

College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
Hattori Botanical Laboratory, Obi 6-1-26, Nichinan, Miyazaki 889-2535, Japan
College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
Asia Bryophyta fragile leaves Himalaya mosses taxonomy Bryophytes

Abstract

Dicranum Hedw. is a highly diverse and widely distributed genus within Dicranaceae, with over 95 species currently accepted. However, the species diversity and distribution of this genus in the Nepal Himalayas are still poorly understood. During our recent reexamination of older herbarium materials, we encountered intriguing specimens from Nepal annotated as “Dicranodontium nepalense”—a nomenclaturally invalid name due to the lack of a diagnosis and description when published. Here, we describe it as a new species, Dicranum nepalense W.Z.Huang, T.X.Zheng & Y.Huan Wu. This species is characterized by the fragile leaf apex, which is often absent in the lower portion of the plant; some leaves fractures at the base, with residual alar cells on the stem, forming a leafless section; a smooth leaf apex; rectangular, thick-walled, strongly porose laminal cells in the upper leaf portion; marginal cells narrower than the inner laminal cells, not porose; transverse section of the costa shows one row of guide cells and one row of slightly smaller cells below, without stereid bands; bistratose alar cells; and a differentiated central strand. In addition, a key for identification of the species of Dicranum with fragile leaves is provided.

References

  1. Allen, B.H. & Ireland, R.R. (2002) The taxonomic status of Dicranodontium subporodictyon in western North America. Lindbergia 27 (2): 73–78. [https://www.jstor.org/stable/20150096]
  2. Asthana, A.K., Shukla, D. & Gupta, R. (2023) Phymatoceros Stotler et al. (Anthocerotophyta) newly recorded from India with a new species, P. binsarensis. Journal of Bryology 45 (3): 236–242. https://doi.org/10.1080/03736687.2023.2245630
  3. Bakalin, V., Vilnet, A., Klimova, K., Ma, W.-Z. & Nguyen, V.S. (2020) Diplophyllum purpurascens (Scapaniaceae, Marchantiophyta)—a new species from Sino-Himalaya (China). Phytotaxa 447 (2): 116–126. https://doi.org/10.11646/phytotaxa.447.2.4
  4. Brotherus, V.F. (1924) Musci (Laubmoose) 1. Hälfte. In: Engler, H.G.A. & Prantl, K. (Eds.) Die natürlichen Pflanzenfamilien, Zweite Auflage. Duncker & Humblot, Berlin, pp. 1–478.
  5. Brotherus, V.F. (1929) Musci. Symbolae Sinicae 4: 1–147.
  6. Bruch, P. & Schimper, W.P. (1847) Fasc. 41. Dicranodontium, Campylopus, Oncophorus. In: Bruch, P., Schimper, W.P. & Gümbel, W.T. (Eds.) Bryologia Europaea. E. Schweizerbart, Stuttgart.
  7. Cardot, J. (1907) Mousses nouvelles du Japon et de Corée. Bulletin de l’Herbier Boissier, sér. 2 7: 709–717.
  8. Corley, M.F.V. & Wallace, E.C. (1974) Dicranodontium subporodictyon Broth. in Scotland. Journal of Bryology 8 (2): 185–189. https://doi.org/10.1179/jbr.1974.8.2.185
  9. Dai, Z., Xing, S.-C., Gradstein, S.R., Chen, X., Zhu, R.-L. & Wang, J. (2021) New species or infraspecific variation? A case study of Ptychanthus striatus var. motuoensis var. nov. (Marchantiophyta: Lejeuneaceae) from Xizang, China. The Bryologist 124 (4): 475–483. https://doi.org/10.1639/0007-2745-124.4.475
  10. Dey, M. & Majumdar, S. (2022) Saccogyna darjeelingensis (Saccogynaceae: Marchantiophyta)—a new species from Eastern Himalaya, India with a new generic record for Indian bryoflora. Current Science 123 (2): 145–147.
  11. Frahm, J.P. (1991) Dicranaceae: Campylopodioideae, Paraleucobryoideae. Flora Neotropica Monograph 54: 1–237. [https://www.jstor.org/stable/4393822]
  12. Frahm, J.P. (1997) A taxonomic revision of Dicranodontium (Musci). Annales Botanici Fennici 34: 179–204.
  13. Gao, C. (1994) Flora Bryophytarum Sinicorum, vol. 1. Science Press, Beijing, 368 pp. [In Chinese]
  14. Gao, C., Crosby, M.R. & S. He. (1999) Moss Flora of China, vol. 1. Science Press, Beijing & Missouri Botanical Garden, St. Louis, 273 pp.
  15. Groombridge, B. (1992) Global biodiversity: status of the earth’s living resources. Chapman and Hall, New York, 594 pp.
  16. Hedwig, J. (1801) Species Muscorum Frondosorum. Joannis Ambrosii Barthii, Lipsiae, 352 pp.
  17. Hooker, W.J. (1820) Musci Exotici 2. Longman et al., London, 97–176 + 31 pp.
  18. Huang, W.-Z. & Zhu, R.-L. (2024) Dicranodontium tenii, a new synonym of Dicranodontium denudatum (Leucobryaceae, Bryophyta). Phytotaxa 645 (2): 190–191. https://doi.org/10.11646/phytotaxa.645.2.9
  19. Huang, W.-Z., Xu, H., Shen, C., Xiang, Y.-L., Zhao, Z.-F. & Zhu, R.-L. (2024) Re-evaluation of the taxonomic status of Campylopus longigemmatus (Leucobryaceae, Bryophyta). Annales Botanici Fennici 61 (1): 63–74. https://doi.org/10.5735/085.061.0110
  20. Huang, W.-Z., Xu, H., Ma, X.-Y. & Zhu, R.-L. (2023) Dicranum hengduanensis (Dicranaceae, Bryophyta), a new species with fragile leaves from the Hengduan Mountains in China. The Bryologist 126 (2): 226–235. https://doi.org/10.1639/0007-2745-126.2.226
  21. Ignatova, E.A. & Fedosov, V.E. (2008) Species of Dicranum (Dicranaceae, Bryophyta) with fragile leaves in Russia. Arctoa 17: 63–83. https://doi.org/10.15298/arctoa.17.05
  22. Ireland, R.R. (2007) Dicranum (Family Dicranaceae). In: Flora of North America Editorial Committee (Eds.) Flora of North America, Volume 27. Oxford University Press, Oxford. pp. 397–420.
  23. Iwatsuki, Z. (1979) Mosses from central Nepal collected by the kochi himalaya expedition, 1976. The Journal of the Hattori Botanical Laboratory 46: 373–384. https://doi.org/10.18968/jhbl.46.0_373
  24. Klazenga, N. (1999) A revision of the Malesian species of Dicranoloma (Dicranaceae, Musci). The Journal of the Hattori Botanical Laboratory 87: 1–130. https://doi.org/10.18968/jhbl.87.0_1
  25. Konstantinova, N.A., Long, D.G., Mamontov, Y.S. & Vilnet, A.A. (2021) Gymnomitrion schusteranum (Gymnomitriaceae), a new species from the Sino-Himalaya. Arctoa 30 (2): 149–158. https://doi.org/10.15298/arctoa.30.16
  26. Kou, J., Feng, C., Niu, B. & Xiao, H.-X. (2020) Encalypta papillosa C.Feng, J.Kou & B.Niu (Encalyptaceae, Musci), a new species from Tibet, China. Journal of Bryology 42 (4): 326–332. https://doi.org/10.1080/03736687.2020.1802184
  27. Lindberg, S.O. (1857) Nya nordiska Moss-arter. Öfversigt af Kongl. Vetenskaps-Akademiens Förhandlingar 14 (4): 123–127.
  28. Lindberg, S.O. (1863) Neue nordische Moose. Hedwigia 2 (11): 67–71.
  29. Mittermeier, R.A., Gil, P.R., Hoffmann, M., Pilgrim, J., Brooks, T., Mittermeier, C.G., Lamoreux, J. & da Fonseca, G.A.B. (2004) Hotspots revisited: Earth’s biologically richest and most endangered terrestrial ecoregions. Conservation International, Mexico, 391 pp.
  30. Noguchi, A. (1987) Illustrated Moss Flora of Japan, Part 1. The Hattori Botanical Laboratory, Nichinan-Shi, 242 pp.
  31. Orme, C.D.L., Davies, R.G., Burgess, M., Eigenbrod, F., Pickup, N., Olson, V.A., Webster, A.J., Ding, T.S., Rasmussen, P.C., Ridgely, R.S., Stattersfield, A.J., Bennett, P.M., Blackburn, T.M., Gaston, K.J. & Owens, I.P.F. (2005) Global hotspots of species richness are not congruent with endemism or threat. Nature 436 (7053): 1016–1019. https://doi.org/10.1038/nature03850
  32. Renauld, F. (1901) Nouvelle classification des Leucoloma. Revue Bryologique 28: 66–70, 85–87.
  33. Sapjegin, A.A. (1910) Laubmoose des Krimgebirges in oekologischen, geographischen und floristischen Hinsicht. Zapiski Novorossiiskago Obshchestva Estestvoispytatelei 36: 15–271.
  34. Turland, N.J., Wiersema, J.H., Barrie, F.R., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Knapp, S., Kusber, W.H., Li, D.Z., Marhold, K., May, T.W., McNeill, J., Monro, A.M., Prado, J., Price, M.J. & Smith, G.F. (2018) International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code) adopted by the Nineteenth International Botanical Congress Shenzhen, China, July 2017. Regnum Vegetabile 159. Koeltz Botanical Books, Glashütten. https://doi.org/10.12705/Code.2018
  35. Wang, R.-H., Shaw, A.J., Shao, X.-M. & Wang, X.-R. (2022) A new propaguliferous species of Pohlia (Mielichhoferiaceae, Bryopsida) from Tibet, China. PhytoKeys 206: 109–117. https://doi.org/10.3897/phytokeys.206.84716