Abstract
Riccia is the largest genus of complex thalloid liverworts (Marchantiopsida) with over 250 species currently accepted. Our recent investigation of Chinese liverworts found two interesting Riccia species, R. junghuhniana and Riccia subcrinita sp. nov. Riccia junghuhniana is currently known from Australia and Indonesia, while Riccia subcrinita is known only from China. Riccia subcrinita is similar to R. crinita, but differs in having smaller spores (56–71 µm in diameter), and spore distal surface and proximal surface alveoli without thick borders. The sequences of rbcL, rps4, and trnL-F, detailed descriptions, and illustrations of the Chinese specimens are provided. The range extension of R. junghuhniana suggests that more taxa of Riccia may have a wider distribution. The discovery of R. junghuhniana and the new species also suggests that a more intensive survey of Riccia diversity in China is necessary.
References
<p>Anonymous (1848) Proceedings of learned societies. Linnean Society. <em>Annals and Magazine of Natural History</em> (ser. 2) 1: 375–387. https://doi.org/10.1080/03745485809496124</p>
<p>Borovichev, E.A. & Bakalin, V.A. (2015) Range extension for <em>Riccia nipponica</em> and comments on the <em>R. crystallina</em> complex (Ricciaceae, Hepaticae). <em>Polish Botanical Journal </em>60: 173–178. https://doi.org/10.1515/pbj-2015-0025</p>
<p>Boulay, J.N. (1904) Muscinées de la France. Deuxième partie. Hépatiques. Paul Klincksieck, Paris, 224 pp.</p>
<p>Braun, A. (1821) Bemerkungen über einige Lebermoose. <em>Flora</em> 4 (2): 754–757.</p>
<p>Brotero, F.A. (1804) <em>Flora Lusitanica, pars II</em>. Typographia Regia, Olissopone [Lisboa], 607 pp.</p>
<p>Cargill, D.C., Beckmann, K. & Seppelt, R. (2021) Taxonomic revision of <em>Riccia</em> (Ricciaceae, Marchantiophyta) in the monsoon tropics of the Northern Territory, Australia. <em>Australian Systematic Botany </em>34: 336–430.</p>
<p>Cargill, D.C., Neal, W.C., Sharma, I. & Gueidan, C. (2016) A preliminary molecular phylogeny of the genus <em>Riccia</em> L. (Ricciaceae) in Australia. <em>Australian Systematic Botany</em> 29: 197–217. https://doi.org/10.1071/SB16018</p>
<p>Chernomor, O., von Haeseler, A. & Minh, B.Q. (2016) Terrace aware data structure for phylogenomic inference from supermatrices. <em>Systematic Biology</em> 65: 997–1008. https://doi.org/10.1093/sysbio/syw037</p>
<p>Corda, A.J.C. (1829) <em>Genera Hepaticarum</em>.<em> In: </em>Opiz, P.M. (Ed.) Beiträge zur Naturgeschichte als Fortsetzung des Naturalientausches No. 12. C.W. Enders, Praha, 643–655.</p>
<p>Gottsche, C.M., Lindenberg, J.B.W. & Nees, C.G. (1846) <em>Synopsis Hepaticarum</em>, fasc. 4. Meissner, Hamburg, 465–624.</p>
<p>Hoffmann, G.F. (1795) <em>Deutschlands Flora. Cryptogamie</em>. Johan Jakob Palm, Erlangen, 200 pp.</p>
<p>Howe, M.A. (1898) New American Hepaticae. <em>Bulletin of the Torrey Botanical Club </em>25: 183–192. https://doi.org/10.2307/2477701</p>
<p>Jovet-Ast, S. (2000) Documents pour la connaissance des <em>Riccia </em>australiens (Hépatiques, Marchantiales) – nouvelles récoltes. Taxons nouveaux. Commentaires morphologiques et écologiques.<em> Cryptogamie, Bryologie</em> 21: 289–343. https://doi.org/10.1016/S1290-0796(00)01042-7</p>
<p>Kalyaanamoorthy, S., Minh, B.Q., Wong, T.K.F., von Haeseler, A. & Jermiin, L.S. (2017) ModelFinder: fast model selection for accurate phylogenetic estimates. <em>Nature Methods</em> 14: 587–589. https://doi.org/10.1038/nmeth.4285</p>
<p>Kashyap, S.R. (1914) Morphological and biological notes on new and little known West Himalayan Liverworts. I. <em>New Phytologist</em> 13 (6/7): 206–226. https://doi.org/10.1111/j.1469-8137.1914.tb05751.x</p>
<p>Katoh, K. & Standley, D.M. (2013) MAFFT multiple sequence alignment software version 7: improvements in performance and usability. <em>Molecular Biology and Evolution</em> 30: 772–780. https://doi.org/10.1093/molbev/mst010</p>
<p>Konstantinova, N.A., Bakalin, V.A., Andrejeva, E.N., Bezgodov, A.G., Borovichev, E.A., Dulin, M.V. & YuS, M. (2009) Checklist of liverworts (Marchantiophyta) of Russia. <em>Arctoa</em> 18: 1–64. https://doi.org/10.15298/arctoa.18.01</p>
<p>Linnaeus, C. (1753)<em> Species Plantarum</em>, ed. 1. Laurentii Salvii, Holmiae [Stockholm], 1200 pp.</p>
<p>Linnaeus, C. (1759) <em>Systema Naturae</em>. Tomus II. Editio Decima, Reformata. Laurentii Salvii, Holmiae [Stockholm], 825–1384.</p>
<p>Minh, B.Q., Schmidt, H.A., Chernomor, O., Schrempf, D., Woodhams, M.D., von Haeseler, A. & Lanfear, R. (2020) IQ-TREE 2: New models and efficient methods for phylogenetic inference in the genomic era. <em>Molecular Biology and Evolution</em> 37: 1530–1534. https://doi.org/10.1093/molbev/msaa015</p>
<p>Müller, J., Müller, K., Neinhuis, C. & Quandt, D. (2010) <em>PhyDE: Phylogenetic Data Editor v0.9971</em>. Available from: www.phyde.de (accessed 12 January 2022)</p>
<p>Myers, N., Mittermeier, R.A., Mittermeier, C.G., Da Fonseca, G.A.B. & Kent, J. (2000) Biodiversity hotspots for conservation priorities. <em>Nature</em> 403: 853–858. https://doi.org/10.1038/35002501</p>
<p>Na-Thalang, O. (1980) A revision of the genus <em>Riccia</em> (Hepaticae) in Australia. <em>Brunonia</em> 3: 61–140. https://doi.org/10.1071/BRU9800061</p>
<p>Özenoðlu, H., Kirmaci, M. & Kiremit, F. (2019) Contributions to the genus <em>Riccia</em> L. (Ricciaceae) in Turkey. <em>Turkish Journal of Botany</em> 43: 253–261. https://doi.org/10.3906/bot-1801-25</p>
<p>Perold, S.M. (1995) The taxonomic history of the Ricciaceae (1937–1995) and a classification of sub-Saharan Ricciae. <em>Bothalia</em> 25: 211–231. https://doi.org/10.4102/abc.v25i1.729</p>
<p>Perold, S.M. (1999) <em>Flora of southern Africa. </em>Hepatophyta. Part I: Marchantiopsida. Fascicle I: Marchantiidae. National Botanical Institute, Pretoria, 249 pp.</p>
<p>Piippo, S. (1990) Annotated catalogue of Chinese Hepaticae and Anthocerotae. <em>Journal of the Hattori Botanical Laboratory</em> 68: 1–192.</p>
<p>Ronquist, F., Teslenko, M., van der Mark, P., Ayres, D.L., Darling, A., Höhna, S., Larget, B., Liu, L., Suchard, M.A. & Huelsenbeck, J.P. (2012) MRBAYES 3.2: efficient Bayesian phylogenetic inference and model selection across a large model space. <em>Systematic Biology</em> 61: 539–542. https://doi.org/10.1093/sysbio/sys029</p>
<p>Ros, R.M., Mazimpaka, V., Abou-Salama, U., Aleffi, M., Blockeel, T.L., Brugués, M., Cano, M.J., Cros, R.M., Dia, M.G., Dirkse, G.M., El Saadawi, W., Erdað, A., Ganeva, A., González-Mancebo, J.M., Herrnstadt, I., Khalil, K., Kürschner, H., Lanfranco, E., Losada-Lima, A., Refai, M.S., Rodriguez-Nunez, S., Sabovljevi, M., Sérgio, C., Shabbara, H.M., Sim-Sim, M. & Söderström, L. (2007) Hepatics and Anthocerotes of the Mediterranean, an annotated checklist. <em>Cryptogamie, Bryologie</em> 28: 351–437.</p>
<p>Schuster, R.M. (1992) <em>The Hepaticae and Anthocerotae of North America.</em> VI. Columbia University Press, New York, 937 pp.</p>
<p>Seppelt, R.D. (1998) The genus <em>Riccia</em> (Marchantiales, Ricciaceae) in South Australia. <em>Hikobia</em> 12 (4): 317–341.</p>
<p>Seppelt, R.D. & Laursen, G.A. (1999) <em>Riccia cavernosa</em> Hoffm. E, emd Raddi, new to the Arctic and the bryoflora of Alaska. <em>Hikobia</em> 13: 71–76.</p>
<p>Sérgio, C. & Sim-Sim, M. (1989) <em>Riccia incrassata </em>Brotero, a neglected name of <em>Oxymitra paleacea </em>Bisch. ex Lindenb. <em>Journal of Bryology</em> 15: 659–663. https://doi.org/10.1179/jbr.1989.15.4.659</p>
<p>Shu, L., Jin, X.-J. & Zhu, R.-L. (2021) Novel classification and biogeography of <em>Leptolejeunea</em> (Lejeuneaceae, Marchantiophyta) with implications for the origin and evolution of the Asian evergreen broad-leaved forests. <em>Journal of Systematics and Evolution</em>. https://doi.org/10.1111/jse.12798</p>
<p>Söderström, L., Hagborg, A., von Konrat, M., Bartholomew-Began, S., Bell, D., Briscoe, L., Brown, E., Cargill, D.C., Cooper, E.D., Costa, D.P., Crandall-Stotler, B.J., 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., Larrain, J., Long, D.G., Nebel, M., Pócs, T., Puche, F., Reiner-Drehwald, 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., Váňa, J., Villareal, J.C., Wigginton, M., Zhang, L. & Zhu, R.-L. (2016) World checklist of hornworts and liverworts. <em>PhytoKeys </em>59: 1–828. https://doi.org/10.3897/phytokeys.59.6261</p>
<p>Stephani, F. (1898) Species Hepaticarum 1. <em>Bulletin de l’Herbier Boissier</em> 6: 309–343.</p>
<p>Tamura, K., Stecher, G., Peterson, D., Filipski, A. & Kumar, S. (2013) MEGA6: Molecular evolutionary genetics analysis Version 6.0. <em>Molecular Biology and Evolution</em> 30 (12): 2725–2729. https://doi.org/10.1093/molbev/mst197</p>
<p>Taylor, T. (1846) New Hepaticae. <em>London Journal of Botany </em>5: 365–417.</p>
<p>Wang, L.S., Jia, Y., Zhang, X.C. & Qin, H.N. (2018) <em>Species Catalogue of China. Vol. 1 Plant</em>s. <em>A Synoptic Checklist (I)</em>. Science Press, Beijing. pp. 1–141.</p>
<p>Wang, Y., Zhao, Y., Song, L., Xie, Y. & Bai, X.-L. (2016) Morphological characteristics and geographical distribution of <em>Riccia albolimbata</em> and <em>Riccia setigera</em> (Ricciaceae). <em>Acta Botanica Boreali-Occidentalia Sinica </em>36: 0618–0623.</p>
<p>Wigginton, M.J. (2018) Checklist and distribution of the liverworts and hornworts of sub-Saharan Africa, including the East African Islands. <em>Tropical Bryology Research Repports</em> 9: 1–138.</p>
<p>Xiang, Y.-L. & Zhu, R.-L. (2019) Sphaerocarpales (Marchantiophyta) new to China, with special references to a new species of <em>Sphaerocarpos</em> from Hengduan Mountains. <em>The Bryologist</em> 122 (4): 586–596. https://doi.org/10.1639/0007-2745-122.4.586</p>
<p>Borovichev, E.A. & Bakalin, V.A. (2015) Range extension for <em>Riccia nipponica</em> and comments on the <em>R. crystallina</em> complex (Ricciaceae, Hepaticae). <em>Polish Botanical Journal </em>60: 173–178. https://doi.org/10.1515/pbj-2015-0025</p>
<p>Boulay, J.N. (1904) Muscinées de la France. Deuxième partie. Hépatiques. Paul Klincksieck, Paris, 224 pp.</p>
<p>Braun, A. (1821) Bemerkungen über einige Lebermoose. <em>Flora</em> 4 (2): 754–757.</p>
<p>Brotero, F.A. (1804) <em>Flora Lusitanica, pars II</em>. Typographia Regia, Olissopone [Lisboa], 607 pp.</p>
<p>Cargill, D.C., Beckmann, K. & Seppelt, R. (2021) Taxonomic revision of <em>Riccia</em> (Ricciaceae, Marchantiophyta) in the monsoon tropics of the Northern Territory, Australia. <em>Australian Systematic Botany </em>34: 336–430.</p>
<p>Cargill, D.C., Neal, W.C., Sharma, I. & Gueidan, C. (2016) A preliminary molecular phylogeny of the genus <em>Riccia</em> L. (Ricciaceae) in Australia. <em>Australian Systematic Botany</em> 29: 197–217. https://doi.org/10.1071/SB16018</p>
<p>Chernomor, O., von Haeseler, A. & Minh, B.Q. (2016) Terrace aware data structure for phylogenomic inference from supermatrices. <em>Systematic Biology</em> 65: 997–1008. https://doi.org/10.1093/sysbio/syw037</p>
<p>Corda, A.J.C. (1829) <em>Genera Hepaticarum</em>.<em> In: </em>Opiz, P.M. (Ed.) Beiträge zur Naturgeschichte als Fortsetzung des Naturalientausches No. 12. C.W. Enders, Praha, 643–655.</p>
<p>Gottsche, C.M., Lindenberg, J.B.W. & Nees, C.G. (1846) <em>Synopsis Hepaticarum</em>, fasc. 4. Meissner, Hamburg, 465–624.</p>
<p>Hoffmann, G.F. (1795) <em>Deutschlands Flora. Cryptogamie</em>. Johan Jakob Palm, Erlangen, 200 pp.</p>
<p>Howe, M.A. (1898) New American Hepaticae. <em>Bulletin of the Torrey Botanical Club </em>25: 183–192. https://doi.org/10.2307/2477701</p>
<p>Jovet-Ast, S. (2000) Documents pour la connaissance des <em>Riccia </em>australiens (Hépatiques, Marchantiales) – nouvelles récoltes. Taxons nouveaux. Commentaires morphologiques et écologiques.<em> Cryptogamie, Bryologie</em> 21: 289–343. https://doi.org/10.1016/S1290-0796(00)01042-7</p>
<p>Kalyaanamoorthy, S., Minh, B.Q., Wong, T.K.F., von Haeseler, A. & Jermiin, L.S. (2017) ModelFinder: fast model selection for accurate phylogenetic estimates. <em>Nature Methods</em> 14: 587–589. https://doi.org/10.1038/nmeth.4285</p>
<p>Kashyap, S.R. (1914) Morphological and biological notes on new and little known West Himalayan Liverworts. I. <em>New Phytologist</em> 13 (6/7): 206–226. https://doi.org/10.1111/j.1469-8137.1914.tb05751.x</p>
<p>Katoh, K. & Standley, D.M. (2013) MAFFT multiple sequence alignment software version 7: improvements in performance and usability. <em>Molecular Biology and Evolution</em> 30: 772–780. https://doi.org/10.1093/molbev/mst010</p>
<p>Konstantinova, N.A., Bakalin, V.A., Andrejeva, E.N., Bezgodov, A.G., Borovichev, E.A., Dulin, M.V. & YuS, M. (2009) Checklist of liverworts (Marchantiophyta) of Russia. <em>Arctoa</em> 18: 1–64. https://doi.org/10.15298/arctoa.18.01</p>
<p>Linnaeus, C. (1753)<em> Species Plantarum</em>, ed. 1. Laurentii Salvii, Holmiae [Stockholm], 1200 pp.</p>
<p>Linnaeus, C. (1759) <em>Systema Naturae</em>. Tomus II. Editio Decima, Reformata. Laurentii Salvii, Holmiae [Stockholm], 825–1384.</p>
<p>Minh, B.Q., Schmidt, H.A., Chernomor, O., Schrempf, D., Woodhams, M.D., von Haeseler, A. & Lanfear, R. (2020) IQ-TREE 2: New models and efficient methods for phylogenetic inference in the genomic era. <em>Molecular Biology and Evolution</em> 37: 1530–1534. https://doi.org/10.1093/molbev/msaa015</p>
<p>Müller, J., Müller, K., Neinhuis, C. & Quandt, D. (2010) <em>PhyDE: Phylogenetic Data Editor v0.9971</em>. Available from: www.phyde.de (accessed 12 January 2022)</p>
<p>Myers, N., Mittermeier, R.A., Mittermeier, C.G., Da Fonseca, G.A.B. & Kent, J. (2000) Biodiversity hotspots for conservation priorities. <em>Nature</em> 403: 853–858. https://doi.org/10.1038/35002501</p>
<p>Na-Thalang, O. (1980) A revision of the genus <em>Riccia</em> (Hepaticae) in Australia. <em>Brunonia</em> 3: 61–140. https://doi.org/10.1071/BRU9800061</p>
<p>Özenoðlu, H., Kirmaci, M. & Kiremit, F. (2019) Contributions to the genus <em>Riccia</em> L. (Ricciaceae) in Turkey. <em>Turkish Journal of Botany</em> 43: 253–261. https://doi.org/10.3906/bot-1801-25</p>
<p>Perold, S.M. (1995) The taxonomic history of the Ricciaceae (1937–1995) and a classification of sub-Saharan Ricciae. <em>Bothalia</em> 25: 211–231. https://doi.org/10.4102/abc.v25i1.729</p>
<p>Perold, S.M. (1999) <em>Flora of southern Africa. </em>Hepatophyta. Part I: Marchantiopsida. Fascicle I: Marchantiidae. National Botanical Institute, Pretoria, 249 pp.</p>
<p>Piippo, S. (1990) Annotated catalogue of Chinese Hepaticae and Anthocerotae. <em>Journal of the Hattori Botanical Laboratory</em> 68: 1–192.</p>
<p>Ronquist, F., Teslenko, M., van der Mark, P., Ayres, D.L., Darling, A., Höhna, S., Larget, B., Liu, L., Suchard, M.A. & Huelsenbeck, J.P. (2012) MRBAYES 3.2: efficient Bayesian phylogenetic inference and model selection across a large model space. <em>Systematic Biology</em> 61: 539–542. https://doi.org/10.1093/sysbio/sys029</p>
<p>Ros, R.M., Mazimpaka, V., Abou-Salama, U., Aleffi, M., Blockeel, T.L., Brugués, M., Cano, M.J., Cros, R.M., Dia, M.G., Dirkse, G.M., El Saadawi, W., Erdað, A., Ganeva, A., González-Mancebo, J.M., Herrnstadt, I., Khalil, K., Kürschner, H., Lanfranco, E., Losada-Lima, A., Refai, M.S., Rodriguez-Nunez, S., Sabovljevi, M., Sérgio, C., Shabbara, H.M., Sim-Sim, M. & Söderström, L. (2007) Hepatics and Anthocerotes of the Mediterranean, an annotated checklist. <em>Cryptogamie, Bryologie</em> 28: 351–437.</p>
<p>Schuster, R.M. (1992) <em>The Hepaticae and Anthocerotae of North America.</em> VI. Columbia University Press, New York, 937 pp.</p>
<p>Seppelt, R.D. (1998) The genus <em>Riccia</em> (Marchantiales, Ricciaceae) in South Australia. <em>Hikobia</em> 12 (4): 317–341.</p>
<p>Seppelt, R.D. & Laursen, G.A. (1999) <em>Riccia cavernosa</em> Hoffm. E, emd Raddi, new to the Arctic and the bryoflora of Alaska. <em>Hikobia</em> 13: 71–76.</p>
<p>Sérgio, C. & Sim-Sim, M. (1989) <em>Riccia incrassata </em>Brotero, a neglected name of <em>Oxymitra paleacea </em>Bisch. ex Lindenb. <em>Journal of Bryology</em> 15: 659–663. https://doi.org/10.1179/jbr.1989.15.4.659</p>
<p>Shu, L., Jin, X.-J. & Zhu, R.-L. (2021) Novel classification and biogeography of <em>Leptolejeunea</em> (Lejeuneaceae, Marchantiophyta) with implications for the origin and evolution of the Asian evergreen broad-leaved forests. <em>Journal of Systematics and Evolution</em>. https://doi.org/10.1111/jse.12798</p>
<p>Söderström, L., Hagborg, A., von Konrat, M., Bartholomew-Began, S., Bell, D., Briscoe, L., Brown, E., Cargill, D.C., Cooper, E.D., Costa, D.P., Crandall-Stotler, B.J., 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., Larrain, J., Long, D.G., Nebel, M., Pócs, T., Puche, F., Reiner-Drehwald, 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., Váňa, J., Villareal, J.C., Wigginton, M., Zhang, L. & Zhu, R.-L. (2016) World checklist of hornworts and liverworts. <em>PhytoKeys </em>59: 1–828. https://doi.org/10.3897/phytokeys.59.6261</p>
<p>Stephani, F. (1898) Species Hepaticarum 1. <em>Bulletin de l’Herbier Boissier</em> 6: 309–343.</p>
<p>Tamura, K., Stecher, G., Peterson, D., Filipski, A. & Kumar, S. (2013) MEGA6: Molecular evolutionary genetics analysis Version 6.0. <em>Molecular Biology and Evolution</em> 30 (12): 2725–2729. https://doi.org/10.1093/molbev/mst197</p>
<p>Taylor, T. (1846) New Hepaticae. <em>London Journal of Botany </em>5: 365–417.</p>
<p>Wang, L.S., Jia, Y., Zhang, X.C. & Qin, H.N. (2018) <em>Species Catalogue of China. Vol. 1 Plant</em>s. <em>A Synoptic Checklist (I)</em>. Science Press, Beijing. pp. 1–141.</p>
<p>Wang, Y., Zhao, Y., Song, L., Xie, Y. & Bai, X.-L. (2016) Morphological characteristics and geographical distribution of <em>Riccia albolimbata</em> and <em>Riccia setigera</em> (Ricciaceae). <em>Acta Botanica Boreali-Occidentalia Sinica </em>36: 0618–0623.</p>
<p>Wigginton, M.J. (2018) Checklist and distribution of the liverworts and hornworts of sub-Saharan Africa, including the East African Islands. <em>Tropical Bryology Research Repports</em> 9: 1–138.</p>
<p>Xiang, Y.-L. & Zhu, R.-L. (2019) Sphaerocarpales (Marchantiophyta) new to China, with special references to a new species of <em>Sphaerocarpos</em> from Hengduan Mountains. <em>The Bryologist</em> 122 (4): 586–596. https://doi.org/10.1639/0007-2745-122.4.586</p>