Ligulate Desmarestia (Desmarestiales,Phaeophyceae) revisited: D. japonica sp. nov. and D. dudresnayi differ from D. ligulata |
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| Authors: | Eun Chan Yang Akira F Peters Hiroshi Kawai Rowena Stern Takeaki Hanyuda Ignacio Bárbara Dieter Gerhard Müller Martina Strittmatter Willem F Prud'Homme van Reine Frithjof C Küpper |
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| Institution: | 1. Culture Collection of Algae and Protozoa (CCAP), The Scottish Association for Marine Science Dunstaffnage Marine Laboratory, Oban, Argyll, Scotland, PA37 1QA UK;2. Marine Ecosystem Research Division, Korea Institute of Ocean Science & Technology, 787 Haeanro, Ansan, 426‐744 Korea;3. Bezhin Rosko, 40 rue des pêcheurs, 29250 Santec, Brittany, France;4. Kobe University Research Center for Inland Seas, Rokkodai, Nadaku, Kobe, 657‐8501 Japan;5. SAHFOS, The Laboratory, Citadel Hill, The Hoe, Plymouth, PL1 2PB UK;6. Coastal Biology Research Group, Facultad de Ciencias, Universidad de A Coru?a, Campus de la Zapateira, A Coru?a, 15071 Spain;7. Fachbereich Biologie, Universit?t Konstanz, Konstanz, D‐78457 Germany;8. Netherlands Centre for Biodiversity Naturalis, Leiden University (section NHN), P.O. Box 9514, RA Leiden, 2300 The Netherlands |
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| Abstract: | The phylogeny of ligulate and sulfuric‐acid containing species of Desmarestia, occurring worldwide from polar to temperate regions, was revised using a multigenic and polyphasic approach. Sequence data, gametophyte characteristics, and sporophyte morphology support reducing a total of 16 taxa to four different species. (1) D. herbacea, containing broad‐bladed and highly branched forms, has dioecious gametophytes. The three other species have monoecious gametophytes: (2) D. ligulata which is profusely branched and, except for one subspecies, narrow‐bladed, (3) Japanese ligulate Desmarestia, here described as D. japonica sp. nov., which is morphologically similar to D. ligulata but genetically distant from all other ligulate taxa. This species may have conserved the morphology of original ligulate Desmarestia. (4) D. dudresnayi, including unbranched or little branched broad‐bladed taxa. A figure of the holotype of D. dudresnayi, which was lost for decades, was relocated. The taxonomy is complemented by a comparison of internal transcribed spacer and cytochrome c oxidase subunit I (cox1) as potential barcode loci, with cox1 offering good resolution, reflecting species delimitations within the genus Desmarestia. |
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| Keywords: | Brown algae cox1
Desmarestia
DNA barcoding multigene phylogeny Phaeophyceae psaA rbcL SSU‐ITS sulfuric acid |
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