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DOI: http://dx.doi.org/10.11646/phytotaxa.277.2.1

The genus Isoetes (Isoetaceae): a provisional checklist of the accepted and unresolved taxa

ANGELO TROIA, JOVANI B. PEREIRA, CHANGKYUN KIM, W. CARL TAYLOR

Abstract


Isoetes is a widely distributed lycophyte genus of at least 200 species occurring in diverse habitats. The species can be difficult to identify because Isoetes, with its apparent simplicity of form and conserved morphology, provides few diagnostic features to reliably distinguish its species. The last worldwide monograph, published nearly a century ago, listed 77 taxa. The first step in producing a flora or monograph of all known species of a genus is to compile a list of the acceptable species names. The list presented here is a compilation of 192 accepted names representing taxa from regions around the world: chromosome numbers were assigned to 101 of them, with polyploidy settled on 46.7%. Distribution mapping of the accepted species indicates that South America is the center of diversity for Isoetes and species diversity is the highest in temperate regions. Many of the species on this list are rare and have limited ranges. The list of taxa can be used to initiate floristic studies and conservation efforts in keeping with the target goals of the Global Strategy for Plant Conservation.


Keywords


biodiversity, conservation, phytogeography, systematics, flora, ploidy, Pteridophytes

References


Bagella, S. & Caria, M.C. (2013) Sensitivity of ephemeral wetland swards with Isoetes histrix Bory to environmental variables: implications for the conservation of Mediterranean temporary ponds. Aquatic Conservation: Marine and Freshwater Ecosystems 23 (2): 277–290.

http://dx.doi.org/10.1002/aqc.2290

Barni, E., Minuzzo, C., Gatto, F., Lonati, M., Abeli, T., Amosso, C., Rossi, G. & Siniscalco, C. (2013) Estimating influence of environmental quality and management of channels on survival of a threatened endemic quillwort. Aquatic Botany 107: 39–46.

http://dx.doi.org/10.1016/j.aquabot.2013.01.009

Bolin, J.F., Bray, R.D., Keskin, M. & Musselman, L.J. (2008) The genus Isoetes L. (Isoetaceae, Lycophyta) in South-Western Asia. Turkish Journal of Botany 32: 447–457.

Braun, A.C.H. (1868) Über die australischen Arten der Gattung Isoëtes. Monatsberichte der Koniglich Preussischen Akademie der Wissenschaften 1868: 523–545.

Brummit, R.K. (2001) Plant Taxonomic Database Standards No. 2, ed. 2. World Geographical Scheme for Recording Plant Distributions, ed. 2. Hunt Institute for Botanical Documentation, Carnegie Mellon University, Pittsburgh. Available from: http://www.nhm.ac.uk/hosted_sites/tdwg/TDWG_geo2.pdf (accessed 29 January 2016)

Brunton, D.F. (2015) Key to the Quillworts (Isoetes: Isoetaceae) of the Southeastern United States. American Fern Journal 105 (2): 86–100.

http://dx.doi.org/10.1640/amfj-105-02-86-100.1

Brunton, D.F. & McNeill, J. (2015) Status, Distribution, and Nomenclature of Northern Quillwort, Isoetes septentrionalis (Isoetaceae), in Canada. Canadian Field-Naturalist 129 (2): 174–180.

Chandra, S., Fraser-Jenkins, C.R., Kumari, A. & Srivastava, A. (2008) A summary of the status of threatened pteridophytes of India. Taiwania 53 (2): 170–209.

Convention on Biological Diversity (2002) COP 6 Decision VI/9, Global Strategy for Plant Conservation, 2002–2010. Sixth Ordinary Meeting of the Conference of the Parties (COP) to the Convention on Biological Diversity, The Hague, The Netherlands. Available from: https://www.cbd.int/decision/cop/default.shtml?id=7183 (accessed 29 January 2016).

Croft, J.R. (1986) The Aquatic Pteridophytes of New Guinea. Australian National Herbarium Centre for Plant Biodiversity Research. Available from: https://www.anbg.gov.au/fern/aquatic/introduction.html (accessed 30 August 2015)

Desfayes, M. (2008–2016) Bibliography and list of Isoetes species with complete synonymy, including fossils. Available from: http://www.michel-desfayes.org/isoetesbiblio&list.html (accessed 29 January 2016)

Durieu de Maisonneuve, M.C. (1864) Notes sur quelques espèces nouvelles d’Isoetes de l’Amérique du Nord et de l’Australie. Bulletin de la Société Botanique de France 11: 100–105.

http://dx.doi.org/10.1080/00378941.1864.10827321

Fraser-Jenkins, C.R. (2008) Endemics and pseudo-endemics in relation to the distribution patterns of Indian pteridophytes. Taiwania 53 (3): 264–292.

Greuter, W. & Troia, A. (2015) Disentangling Isoetes setacea and removing threats to Isoetes echinospora. Taxon 64: 811–815.

http://dx.doi.org/10.12705/644.12

Hassler, M. & Swale, B. (2001–2016) Checklist of Ferns and Fern Allies. Available from: http://homepages.caverock.net.nz/~bj/fern/list.htm (accessed 29 January 2016)

Hickey, R.J. (1995) Isoetaceae. In: Davidse, G., Sousa Sánchez, M. & Chater, A.O. (Eds.) Flora Mesoamericana. Universidad Nacional Autónoma de México, México, D.F. Available from: http://www.tropicos.org/Name/42000400?projectid=3&langid=66 (accessed 23 August 2016)

Hickey, R.J., Macluf, C. & Taylor, W.C. (2003) A re-evaluation of Isoetes savatieri Franchet in Argentina and Chile. American Fern Journal 93 (3): 126–136.

Hofstra, D.E., Gemmill, C.E.C. & de Winton, M.D. (2006) Preliminary genetic assessment of New Zealand Isoëtes and Nitella, using DNA sequencing and RAPDs. Science for Conservation 266. New Zealand Department of Conservation. [ISSN 1173-2946, ISBN 0-478-14073-8]

Hoot, S.B. & Taylor, W.C. (2001) The utility of nuclear ITS, a leafy homolog intron, and chloroplast atpB-rbcL spacer region data in phylogenetic analyses and species delimitation in Isoetes. American Fern Journal 91 (3): 166–177.

Hoot, S.B., Napier, N.S. & Taylor, W.C. (2004) Revealing unknown or extinct lineages within Isoetes (Isoetaceae) using DNA sequences from hybrids. American Journal of Botany 91: 899–904.

http://dx.doi.org/10.3732/ajb.91.6.899

Hoot, S.B., Taylor, W.C. & Napier, N.S. (2006) Phylogeny and biogeography of Isoetes (Isoetaceae) based on nuclear and chloroplast DNA sequence data. Systematic Botany 31: 449–460.

http://dx.doi.org/10.1600/036364406778388511

IUCN (2015) The IUCN Red List of Threatened Species, version 2015–4. IUCN Red List Unit, Cambridge U.K. Available from: http://www.iucnredlist.org (accessed 30 December 2015)

Jermy, A.C. (1990) Isoetaceae. In: Kubitzki, K. (Ed.) The Families and Genera of Vascular Plants, 1. Springer, Berlin, pp. 26–31.

http://dx.doi.org/10.1007/978-3-662-02604-5_9

Larsén, E. & Rydin, C. (2016) Disentangling the phylogeny of Isoetes (Isoetales), using Nuclear and Plastid Data. International Journal of Plant Sciences 177 (2): 157–174.

http://dx.doi.org/10.1086/684179

Linnaeus, C. (1753) Species Plantarum. Imprensis Laurentii Salvii, Holmiae, 1200 pp.

Liu, X., Wang, Y., Wang, Q.F. & Guo, Y.H. (2002) Chromosome numbers of the Chinese Isoetes and their taxonomical significance. Acta Phytotaxonomica Sinica 40: 351–356.

Mace, G.M. (2004) The role of taxonomy in species conservation. Philosophical Transactions of the Royal Society B 359: 711–719.

http://dx.doi.org/10.1098/rstb.2003.1454

Marsden, C.R. (1979) Morphology and taxonomy of Isoetes in Australasia, India, North-East and South-East Asia, China and Japan. PhD Thesis. Department of Botany, University of Adelaide, Australia.

McNeill, J., Barrie, F.R., Buck, W.R., Demoulin, V., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Knapp, S., Marhold, K., Prado, J., Prud’homme van Reine, W.F., Smith, G.F., Wiersema, J.H. & Turland, N.J. (2012) International Code of Nomenclature for algae, fungi, and plants (Melbourne Code) adopted by the Eighteenth International Botanical Congress, Melbourne, Australia, July 2011. Regnum Vegetabile 154: 1–240.

Musselman, L.J. (2012–2016) Isoetes. Available from: http://ww2.odu.edu/~lmusselm/plant/isoetes (accessed 29 January 2016).

Musselman, L.J. & Roux, J.P. (2002) Isoetes toximontana (Isoetaceae), a new quillwort with green megaspores from the Northern Cape of South Africa. Novon 12 (4): 504–507.

http://dx.doi.org/10.2307/3393131

Paton, A.J., Brummitt, N., Govaerts, R., Harman, K., Hinchcliffe, S., Allkin, R. & Nic Lughadha, E. (2008) Towards Target 1 of the Global Strategy for Plant Conservation: A working list of all known plant species - Progress and prospects. Taxon 57: 602–611.

Pereira, J.B., Mittelbach, M. & Labiak, P.H. (2015) Studies on chromosome numbers and spore size in Brazilian Isoetes. American Fern Journal 105 (3): 226–237.

http://dx.doi.org/10.1640/0002-8444-105.3.226

Peruzzi, L., Cesca, G. & Puntillo, D. (2003) Isoetes (Isoetaceae), Ophioglossum and Botrychium (Ophioglossaceae) in Calabria (Southern Italy): More karyological and taxonomical data. Caryologia 56: 355–359.

http://dx.doi.org/10.1080/00087114.2003.10589345

Pfeiffer, N.A. (1922) Monograph of the Isoetaceae. Annals of the Missouri Botanical Garden 9: 79–232.

http://dx.doi.org/10.2307/2990000

Pigg, K.B. (2001) Isoetalean lycopsid evolution: from the Devonian to the present. American Fern Journal 91 (3): 99–114.

Retallack, G. J. (1997) Earliest Triassic origin of Isoetes and Quillwort evolutionary radiation. Journal of Paleontology 71 (3): 500–521.

http://dx.doi.org/10.1017/S0022336000039524

Roux, J.P. (2009) Synopsis of the Lycopodiophyta and Pteridophyta of Africa, Madagascar, and neighbouring islands. Strelitzia 23. South African National Biodiversity Institute, Pretoria, xiv + 296 pp.

Ruiz, E. (2008) Management of Natura 2000 habitats. 3170* Mediterranean temporary ponds. European Commission Technical Report 2008 07/24. Brussels, Belgium. Available from: http://ec.europa.eu/environment/nature/natura2000/management/habitats/pdf/3170_Mediterranean_temporary_ponds.pdf (accessed 29 January 2016)

Small, R.L. & Hickey, R.J. (2001) Systematics of the northern Andean Isoetes karstenii complex. American Fern Journal 91 (2): 41–69.

Stafleu, F.A. & Cowan, R.S. (1976–1988) Taxonomic literature: a selective guide to botanical publications and collections with dates, commentaries and types. Volumes 1–7. Ed. 2. Bohn, Scheltema and Holkema, Utrecht and Antwerp. [Regnum Vegetabile 94, 98, 105, 110, 112, 115, 116] Available from: http://www.sil.si.edu/digitalcollections/tl-2/index.cfm (accessed 29 January 2016)

Taylor, W.C., Luebke, N.T. & Smith, M.B. (1985) Speciation and hybridization in North American Quillworts. Proceedings of the Royal Society of Edinburgh. Section B. Biological Sciences 86: 259–263.

Taylor, W.C., Luebke, N.T., Britton, D.M., Hickey, R.J. & Brunton, D.F. (1993) Isoetaceae. In: F.N.A. Editorial Committee (Eds.) Flora of North America, North of Mexico, vol. 2. Oxford University Press, New York, pp. 64–75.

Taylor, W.C., Luebke, N.T. & Lekschas, A.R. (2001) Taxonomic status and evolutionary relationship of Isoetes minima A.A. Eaton (Isoetaceae) based on nuclear ribosomal DNA internal transcribed spacer sequences. Botanical Electronic News 304. Available from: http://www.ou.edu/cas/botany-micro/ben/ben304.html

The International Plant Names Index (2015) Published on the Internet: http://www.ipni.org (accessed 1 November 2015)

The Plant List (2013–2016) Version 1.1. Published on the Internet: http://www.theplantlist.org/ (accessed 19 January 2016)

Tindale, M.D. & Roy, S.K. (2002) A cytotaxonomic survey of the Pteridophyta of Australia. Australian Systematic Botany 15: 839–937.

http://dx.doi.org/10.1071/SB00034

Troia, A. (2001) The genus Isoetes L. (Lycophyta, Isoetaceae): synthesis of karyological data. Webbia 56 (1): 201–218.

http://dx.doi.org/10.1080/00837792.2001.10670712

Troia, A. & Greuter, W. (2014) A critical conspectus of Italian Isoetes (Isoetaceae). Plant Biosystems 148: 13–20.

http://dx.doi.org/10.1080/11263504.2013.878409

Troia, A. & Greuter, W. (2015) A conspectus of and key to Greek Isoetes (Isoetaceae), based on a reassessment of Haussknecht’s gatherings of 1885. Willdenowia 45 (3): 391–403.

http://dx.doi.org/10.3372/wi.45.45303

Troia, A., Marino, P. & Orlando, A.M. (2011) Report 1751. Isoëtes todaroana Troia & Raimondo. In: Kamari, G., Blanché, C. & Siljak, Yakovlev, S. (Eds) Mediterranean chromosome number reports. Flora Mediterranea 21: 369–370.

Troia, A., Raimondo, F.M. & Campisi, P. (2014) The Isoetes longissima complex (Isoetaceae) in Italy: observations on the morphology of spores and leaves, and taxonomic implications. Phytotaxa 174 (3): 149–156.

http://dx.doi.org/10.11646/phytotaxa.174.3.3

Wood, T.E., Takebayashi, N., Barker, M.S., Mayrose, I., Greenspoon, P.B. & Rieseberg, L.H. (2009) The frequency of polyploid speciation in vascular plants. Proceedings of the National Academy of Sciences of the United States of America 106 (33): 13875–13879.

http://dx.doi.org/10.1073/pnas.0811575106


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