Abstract
An account of the Drepanolejeunea subgenus Rhaphidolejeunea in Thailand has been updated based on herbarium specimens and recent collections from field surveys. Five species of Drepanolejeunea, i.e. Drepanolejeunea commutata, D. fleischeri, D. siamensis, D. spicata, and D. yunnanensis are recognized. Of these, Drepanolejeunea commutata, D. fleischeri, and D. yunnanensis are newly reported for Thailand. A key to species, descriptions, distribution ranges and illustrations of each species are provided. The ecology and geographical distribution of the species are noted. Additionally, Drepanolejeunea longicruris is excluded from the country.
References
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<p>Chantanaorrapint, S., Boonkerd, T. & Thaithong, O. (2004) Checklist of bryophytes at the summit of Khao Luang, Huai Yang waterfall National Park, Prachuap Khiri Khan Province, Thailand. <em>National History Bulletin of the Siam Society</em> 52: 163–179.</p>
<p>Chen, P.C. (1955) Bryophyta nova Sinica. <em>Feddes Repertorium Specierum Novarum Regni Vegetabilis</em> 58: 23–52.</p>
<p>Dandotiya, D., Govindapyari, H., Sumam, S. & Uniyal, P.L. (2011) Checklist of the bryophytes of India. <em>Archive for Bryology</em> 88: 1–126.</p>
<p>Dey, M. & Singh, D.K. (2010) <em>Drepanolejeunea fleischeri</em> (Steph.) Grolle & R.L. Zhu (Hepaticae: Lejeuneaceae): an addition to Indian Himalaya.<em> Geophytology</em> 39: 65–71.</p>
<p>Dey, M. & Singh, D.K. (2012) <em>Epiphyllous liverworts of Eastern Himalaya</em>. Botanical survey of India, Kolkata. 364 pp.</p>
<p>Dey, M. & Singh, D.K. (2016) Three foliicolous taxa of Lejeuneaceae (Marchantiophyta) new to India from Great Nicobar Biosphere Reserve, Andaman and Nicobar Islands. <em>Acta Botanica Hungarica </em>58: 49–68. https://doi.org/10.1556/034.58.2016.1-2.2</p>
<p>Dey, M., Singh, D. & Singh, D.K. (2013) The genus <em>Drepanolejeunea</em> (Marchantiophyta: Lejeuneaceae) in India with a note on three new additions from Eastern Himalaya. <em>Tropical Biology</em> 35:14–25. https://doi.org/10.11646/bde.35.1.2</p>
<p>Gradstein, S.R. (2018) Amphi-Pacific tropical disjunctions in the bryophyte floras of Asia and the New World. <em>Philippine Journal of Systematic Biology</em> 12: 1–11. https://doi.org/10.26757/pjsb.2018a12012</p>
<p>Grolle, R. (1965) Lebermoose aus Neuguinea. I. <em>Journal of the Hattori Botanical Laboratory</em> 28: 43–54.</p>
<p>Grolle, R. & Zhu, R.-L. (2000) A study of <em>Drepanolejeunea </em>subg.<em> Rhaphidolejeunea</em> (Herzog) Grolle & R.L. Zhu, stat. nov. (Hepaticae, Lejeuneaceae) in China with notes on its species elsewhere. <em>Nova Hedwigia</em> 70: 373–395.</p>
<p>He, Q., Zhu, R.-L., Chantanaorrapint, S., Kornochalert, S. & Printarakul, N. (2012) <em>Drepanolejeunea laciniata</em> (Lejeuneaceae), a new species from northern Thailand. <em>Cryptogamie, Bryologie</em> 33: 291–298. http://dx.doi.org/10.7872/cryb.v33.iss3.2012.291</p>
<p>Herzog, T. (1943) <em>Rhaphidolejeunea</em> Herz., eine neue Lejeuneaceengattung der Indomalaya. <em>Mittheilungen des Thüringischen botanischen Vereins</em> 50: 100–105.</p>
<p>Inuthai, J., Zhu, R.-L. & Chantanaorrapint, S. (2014) <em>Drepanolejeunea actinogyna</em> (Lejeuneaceae), a new species from southern Thailand. <em>The Bryologist</em> 117: 165–169. https://doi.org/10.1639/0007-2745-117.2.165</p>
<p>Inuthai, J., Zhu, R.-L. & Chantanaorrapint, S. (2015) Taxonomic notes on <em>Drepanolejeunea pleiodictya</em> (Marchantiophyta, Lejeuneaceae), a little-known Asiatic species. <em>Polish Botanical Journal </em>60(1): 13–17. https://doi.org/10.1515/pbj-2015-0012</p>
<p>Kumar, S., Pócs, T. & Singh, S.K. (2015) Two <em>Drepanolejeunea</em> [Marchantiophyta] new to bryoflora of Meghalaya. <em>Indian Journal of Forestry</em> 38 (4): 343–349.</p>
<p>Lai, M.-J., Zhu, R.-L. & Chantanaorrapint, S. (2008) Liverworts and hornworts of Thailand: an updated checklist and bryofloristic accounts. <em>Annales Botanici Fennici</em> 45: 321–341. https://doi.org/10.5735/085.045.0501</p>
<p>Long, D.G. & Rubasinghe, S.C.K. (2014) Liverworts and Hornworts of Sri Lanka: a revised checklist. <em>Ceylon Journal of Science (Biological Sciences)</em> 43: 1–36. http://dx.doi.org/10.4038/cjsbs.v43i1.7280</p>
<p>Mizutani, M. (1966) Epiphyllous species of Lejeuneaceae from Sabah (North Borneo). <em>The Journal of the Hattori Botanical Laboratory</em> 29: 153–170.</p>
<p>Mizutani, M. (1970) Lejeuneaceae, subfamily Lejeunoideae and Cololejeunoideae from Sabah (North Borneo). <em>The Journal of the Hattori Botanical Laboratory</em> 33: 225–265.</p>
<p>Pócs, T. (2012) New or little known epiphyllous liverworts, XVI. A small collection from Laos. <em>Acta Biologica Plantarum Agriensis</em> 2: 5–10.</p>
<p>Pócs, T., Luong, T.-T. & Ho, B.-C. (2013) New or little known epiphyllous liverworts, XVIII. Records from The Bidoup-Núi Bà National Park, Vietnam, with the description of <em>Drepanolejeunea bidoupensis</em> <em>sp. nov.</em> <em>Cryptogamie, Bryologie</em> 34: 287–298. https://doi.org/10.7872/cryb.v34.iss3.2013.287</p>
<p>Pócs, T., Mizutani, M. & Koponen, T. (2019) Bryophyte flora of the Huon Peninsula, Papua New Guinea. LXXX. <em>Cheilolejeunea</em> and <em>Drepanolejeunea</em>, with contributions to <em>Ceratolejeunea</em>, <em>Cololejeunea</em>, <em>Diplasiolejeunea</em>, <em>Lejeunea</em>, <em>Leptolejeunea</em>, <em>Metalejeunea</em> and <em>Microlejeune</em>a (Lejeuneaceae, Marchantiophyta). <em>Acta Bryolichenologica Asiatica</em> 8: 41–84.</p>
<p>Pócs, T., Mohamed, H., Yong, K.-T. & Cheah, Y.-H. (2014) Data to the Malaysian liverwort flora, I. <em>Polish Botanical Journal</em> 59:215–220. https://doi.org/10.2478/pbj-2014-0042</p>
<p>Pócs, T & Podani, J. (2015) Southern Thailand Bryophytes II: Epiphylls from the Phang-Nga area. <em>Acta Botanica Hungarica </em>57:183–198. http://dx.doi.org/10.1556/ABot.57.2015.1-2.14</p>
<p>Sande Lacoste, C.M. van der (1864) Hepaticae, Jungermannieae Archipelagi Indici. adjectis quibusdam speciebus Japonicis. <em>Annales Musei botanici lugduno-batavi</em> 1: 287–314.</p>
<p>Schiffner, V. (1898) <em>Conspectus Hepaticarum Archipelagi Indici</em>. Batavia, 382 pp.</p>
<p>Schuster, R.M. (1963) An annotated synopsis of the genera and subgenera of Lejeuneaceae. I. Introduction; annotated keys to subfamilies and genera. <em>Nova Hedwigia Beihefte </em>9: 1–203.</p>
<p>Singh, D., Dey, M. & Singh, D.K. (2010) A Synoptic Flora of Liverworts and Hornworts of Manipur. <em>Nelumbo</em> 52: 9–52.</p>
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