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Issue: Vol. 714 No. 2: 8 Aug. 2025
Type: Article
Published: 2025-08-08
DOI: 10.11646/phytotaxa.714.2.5
Page range: 171-180
Abstract views: 577
PDF downloaded: 11

Plagiochila meagheriana (Plagiochilaceae: Marchantiophyta), a new species with dimorphic leaf cells from Darjeeling District, Eastern Himalaya, India

Scottish Church College, Department of Botany, 1 & 3 Urquhart Square, Kolkata 700 006, West Bengal, India
Botanical Survey of India, Sikkim Himalayan Regional Centre, Gangtok 737 103, India
Lepchajagat Plagiochila Section Peculiares vermiculate leaf cells West Bengal Bryophytes

Abstract

A new species of Plagiochila (Dumort.) Dumort., Plagiochila meagheriana sp. nov.  characterized by having much longer than wide, horizontally spreading rectangulate leaves with truncate apices, both dorsal and ventral stem surface exposed, dimorphic cells in leaves of younger and older portion of the shoot, and lacking basal vitta-like area in leaf cells is described from Darjeeling district of West Bengal in Eastern Himalaya, India. It has been placed under Section Peculiares Schiffn. due to the presence of Peculiares-type vermiculate leaf cells.

References

  1. Abeywickrama, B.A. (1959) The genera of the liverworts of Ceylon. Ceylon Journal of Science. Biological Sciences 2 (1): 33–81.
  2. Bakalin, V.A. & Vilnet, A.A. (2017) A new large-celled species of Plagiochila (Plagiochilaceae, Hepaticae) from the southern flank of the Russian Far East. Botanica Pacifica 6 (2): 53–58. https://doi.org/10.17581/bp.2017.06208
  3. Bakalin, V. & Vilnet, A. (2020) Plagiochila xerophila (Plagiochilaceae, Marchantiophyta) – a highly xerophilous new species from the Tibetan Spur (China). Plant Ecology and Evolution 153 (1): 120–131. https://doi.org/10.5091/plecevo.2020.1560
  4. Carl, H. (1931) Die Arttypen und die systematische Gliederung der Gattung Plagiochila Dum. Annales Bryologici 2 (Supplement): 1–170.
  5. Daniels, A.E.D., Aishwarya, S.R., Williams, Z.H. & Rawat, K.K. (2024) Two new species of Plagiochila (Plagiochilaceae) from the Western Ghats. Nelumbo 66 (2): 17–21.
  6. Dumortier, B.C. (1831) Sylloge Jungermannidearum Europae indigenarum. J. Casterman, Tournay, 100 pp.
  7. Dumortier, B.C. (1835) Recueil d’Observations sur les Jungermanniacées. J.-A. Blanquart, Tournay, 27 pp. https://doi.org/10.5962/bhl.title.731
  8. Gradstein, S.R. & Benitez, A. (2017) Liverworts new to Ecuador with description of Plagiochila priceana sp. nov. and Syzygiella burghardtii sp. nov. Cryptogamie, Bryologie 38 (4): 335–348. https://doi.org/10.7872/cryb/v38.iss4.2017.335
  9. Gradstein, S.R. & Costa, D.P. (2018) Plagiochila lamyana, a new liverwort species from the Guayana Highland of Brazil. Cryptogamie, Bryologie 39 (2): 147–153. https://doi.org/10.7872/cryb/v39.iss2.2018.147
  10. Gradstein, S.R. & León-Yánez, S. (2018) Liverworts (Marchantiophyta) of Polylepis pauta forests from Ecuador with description of Leptoscyphus leoniae sp. nov. and Plagiochila pautaphila sp. nov. Nova Hedwigia 106 (1/2): 35–48. https://doi.org/10.1127/nova_hedwigia/2017/0432
  11. Gradstein, S.R. & Reeb, C. (2022) The genus Plagiochila (Dumort.) Dumort. (Marchantiophyta) in Madagascar. Cryptogamie, Bryologie 43 (5): 65–106. https://doi.org/10.5252/cryptogamie-bryologie2022v43a5
  12. Grolle, R. & So, M.-L. (1999) Notes on Plagiochila subgenus Paraplagiochila (Hepaticae). Journal of Bryology 21 (3): 197–199. https://doi.org/10.1179/jbr.1999.21.3.197
  13. Herzog, T. (1950) Hepaticae Borneenses (Oxford University to Sarawak, 1932). Transactions of the British Bryological Society 1: 275–326. https://doi.org/10.1179/006813850804878680
  14. Inoue, H. (1965) Contributions to the knowledge of the Plagiochilaceae of southeastern Asia. VII. Synopsis of Plagiochila Dum. in the Himalayan region. Bulletin of the National Science Museum, Tokyo, New Series 8: 375–403.
  15. Inoue, H. (1969) Contributions to the knowledge of the Plagiochilaceae of Southeastern Asia XIII. New species of Plagiochila with Notes on sect. Abietinae and sect. Peculiares. Journal of the Hattori Botanical Laboratory 32: 99–115.
  16. Inoue, H. (1970) Plagiochilaceae notes. I. On some species of Plagiochila from the South Pacific Islands. Journal of the Hattori Botanical Laboratory 33: 305–316.
  17. Inoue, H. (1984) The genus Plagiochila (Dum.) Dum. in southeast Asia. Academia Scientific Book, Tokyo, 142 pp.
  18. Majumdar, S. & Dey, M. (2021) Present status of Liverworts and Hornworts in India. Annals of Plant Sciences 10 (3): 4162–4166.
  19. Majumdar, S. & Singh, D.K. (2015) A new species of the genus Plagiochila (Plagiochilaceae, Marchantiophyta) from Arunachal Pradesh, Eastern Himalaya, India. NeBIO 6 (4): 8–12.
  20. Pócs, T. (2015) Validation of Plagiochila fracta nomen nudum (Jungermanniopsida). East African bryophytes XXXI. Phytotaxa 195 (2): 183–187. https://doi.org/10.11646/phytotaxa.195.2.8
  21. Renner, M.A.M. (2018) A revision of Australian Plagiochila (Lophocoleinae: Jungermanniopsida). Telopea 21: 187–380. https://doi.org/10.7751/telopea12959
  22. Renner, M.A.M., Patzak, S.D.F., Heslewood, M.M., Schäfer-Verwimp, A. & Heinrichs, J. (2017) Third time lucky? Another substantially revised sectional classification for Australasian Plagiochila (Plagiochilaceae: Jungermanniopsida). Australian Systematic Botany 30 (1): 70–104. https://doi.org/10.1071/SB16038
  23. Schiffner, V. (1900) Die Hepaticae der Flora von Buitenzorg. I. Band. E. J. Brill, Leiden, 220 pp.
  24. Singh, D.K., Singh, S.K. & Singh, D. (2016) Liverworts and Hornworts of India – An Annotated Checklist. Botanical Survey of India, Bhubaneswar, 439 pp.
  25. Singh, S.K. & Rawat, K.K. (2020) Two New Plagiochila (Marchantiophyta: Plagiochilaceae) from India. Annals of Forestry 28 (1&2): 1–5.
  26. Singh Deo, S. & Singh, D.K. (2016) Plagiochila parvivittata Inoue var. siangensis var. nov. (Plagiochilaceae, Marchantiophyta) from Arunachal Pradesh, India. Plant Science Today 3 (1): 63–67. https://doi.org/10.14719/pst.2016.3.1.185
  27. Söderström, L., Hagborg, A., von Konrat, M., Bartholomew-Began, S., Bell, D., Briscoe, L., Brown, E., Cargill, D.C., Costa, D.P., Crandall-Stotler, B.J., Cooper, E.D., Dauphin, G., Engel, J.J., Feldberg, K., Glenny, D., Gradstein, S.R., He, X., Ilkiu-Borges, A.L., Heinrichs, J., Hentschel, J., Katagiri, T., Konstantinova, N.A., Larraín, J., Long, D.G., Nebel, M., Pócs, T., Puche, F., Reiner-Drehwald, M.E., Renner, M.A.M., Sass-Gyarmati, A., Schäfer-Verwimp, A., Segarra Moragues, J.G., Stotler, R.E., Sukkharak, P., Thiers, B.M., Uribe, J., Váña, J., Villarreal, J.C., Wigginton, M., Zhang, L. & Zhu, R.-L. (2016) World checklist of hornworts and liverworts. PhytoKeys 59: 1–828. https://doi.org/10.3897/phytokeys.59.6261
  28. Söderström, L., Hagborg, A. & von Konrat, M. (2015) Notes on Early Land Plants Today. 69. Circumscription of Plagiochilaceae (Marchantiophyta) with a preliminary infrageneric subdivision of Plagiochila. Phytotaxa 208 (1): 75–91. https://doi.org/10.11646/phytotaxa.208.1.8
  29. Stephani, F. (1903a) Species hepaticarum 2. Bulletin de l’Herbier Boissier, Série 2 10: 358–373.
  30. Stephani, F. (1903b) Species hepaticarum 2. Bulletin de l’Herbier Boissier, Série 2 3: 326–341.
  31. Stephani, F. (1908) Species hepaticarum. 3. Bulletin de l’Herbier Boissier, Série 2 8: 745–776.

How to Cite

Majumdar, S. & Dey, M. (2025) Plagiochila meagheriana (Plagiochilaceae: Marchantiophyta), a new species with dimorphic leaf cells from Darjeeling District, Eastern Himalaya, India. Phytotaxa 714 (2): 171–180. https://doi.org/10.11646/phytotaxa.714.2.5