Species Diversity of <i>Gelidium</i> from Southern Madagascar Evaluated by an Integrative Taxonomic Approach
The diversity of red algae is significantly increasing; in the recent interest of climate changes, taxonomic and biogeographic studies are needed in untouched regions such as ecological important islands. We examined a collection of <i>Gelidium</i> specimens gathered during the 2010 Atim...
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MDPI AG
2022-10-01
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| author | Ga Hun Boo Line Le Gall Il Ki Hwang Florence Rousseau Hwan Su Yoon |
| author_facet | Ga Hun Boo Line Le Gall Il Ki Hwang Florence Rousseau Hwan Su Yoon |
| author_sort | Ga Hun Boo |
| collection | DOAJ |
| description | The diversity of red algae is significantly increasing; in the recent interest of climate changes, taxonomic and biogeographic studies are needed in untouched regions such as ecological important islands. We examined a collection of <i>Gelidium</i> specimens gathered during the 2010 Atimo Vatae expedition based on the morphology and DNA sequencing of mitochondrial <i>cox</i>1 and plastid <i>rbc</i>L. Both morphological and molecular datasets demonstrated the presence of three species in Madagascar; <i>G. leptum</i> G.H.Boo, L.Le Gall and H.S.Yoon, sp. nov., described here, and <i>G. sclerophyllum</i> W.R.Taylor and <i>G. usmanghanii</i> Afaq-Husain and Shameel. <i>Gelidium leptum</i> is distinguished by thin, slender, flattened thalli with irregular branches, compactly arranged thick-walled cells in medulla, sparse rhizoidal filaments at both sides of branches, and elongate sori of tetrasporangia. <i>Gelidium sclerophyllum</i>, previously considered as endemic to the Tropical Eastern Pacific, is first reported in the Indian Ocean and Hawai’i; <i>G. usmanghanii</i>, previously reported to occur in Pakistan and Oman, also presents a first record in the Southern Hemisphere. Phylogenies inferred from <i>cox</i>1 and <i>rbc</i>L sequences suggests that each of the three species likely diverged from different ancestors. The Madagascan <i>Gelidium</i> comprises two geographical elements; Madagascan endemic (<i>G. leptum</i>) and widespread species (<i>G. sclerophyllum</i> and <i>G. usmanghanii</i>). |
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| spelling | doaj.art-3b417193c0864b7c8197e5080b486d602023-11-23T23:48:21ZengMDPI AGDiversity1424-28182022-10-01141082610.3390/d14100826Species Diversity of <i>Gelidium</i> from Southern Madagascar Evaluated by an Integrative Taxonomic ApproachGa Hun Boo0Line Le Gall1Il Ki Hwang2Florence Rousseau3Hwan Su Yoon4Department of Biological Sciences, Sungkyunkwan University, Suwon 16419, KoreaInstitut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d’Histoire Naturelle, CNRS, Sorbonne Université, EPHE, 75231 Paris, FranceAquaculture Research Division, National Institute of Fishery Science, Gijang 46083, KoreaInstitut de Systématique, Evolution, Biodiversité (ISYEB), Muséum National d’Histoire Naturelle, CNRS, Sorbonne Université, EPHE, 75231 Paris, FranceDepartment of Biological Sciences, Sungkyunkwan University, Suwon 16419, KoreaThe diversity of red algae is significantly increasing; in the recent interest of climate changes, taxonomic and biogeographic studies are needed in untouched regions such as ecological important islands. We examined a collection of <i>Gelidium</i> specimens gathered during the 2010 Atimo Vatae expedition based on the morphology and DNA sequencing of mitochondrial <i>cox</i>1 and plastid <i>rbc</i>L. Both morphological and molecular datasets demonstrated the presence of three species in Madagascar; <i>G. leptum</i> G.H.Boo, L.Le Gall and H.S.Yoon, sp. nov., described here, and <i>G. sclerophyllum</i> W.R.Taylor and <i>G. usmanghanii</i> Afaq-Husain and Shameel. <i>Gelidium leptum</i> is distinguished by thin, slender, flattened thalli with irregular branches, compactly arranged thick-walled cells in medulla, sparse rhizoidal filaments at both sides of branches, and elongate sori of tetrasporangia. <i>Gelidium sclerophyllum</i>, previously considered as endemic to the Tropical Eastern Pacific, is first reported in the Indian Ocean and Hawai’i; <i>G. usmanghanii</i>, previously reported to occur in Pakistan and Oman, also presents a first record in the Southern Hemisphere. Phylogenies inferred from <i>cox</i>1 and <i>rbc</i>L sequences suggests that each of the three species likely diverged from different ancestors. The Madagascan <i>Gelidium</i> comprises two geographical elements; Madagascan endemic (<i>G. leptum</i>) and widespread species (<i>G. sclerophyllum</i> and <i>G. usmanghanii</i>).https://www.mdpi.com/1424-2818/14/10/826biogeography<i>cox</i>1<i>Gelidium leptum</i><i>G. sclerophyllum</i><i>G. usmanghanii</i><i>rbc</i>L |
| spellingShingle | Ga Hun Boo Line Le Gall Il Ki Hwang Florence Rousseau Hwan Su Yoon Species Diversity of <i>Gelidium</i> from Southern Madagascar Evaluated by an Integrative Taxonomic Approach Diversity biogeography <i>cox</i>1 <i>Gelidium leptum</i> <i>G. sclerophyllum</i> <i>G. usmanghanii</i> <i>rbc</i>L |
| title | Species Diversity of <i>Gelidium</i> from Southern Madagascar Evaluated by an Integrative Taxonomic Approach |
| title_full | Species Diversity of <i>Gelidium</i> from Southern Madagascar Evaluated by an Integrative Taxonomic Approach |
| title_fullStr | Species Diversity of <i>Gelidium</i> from Southern Madagascar Evaluated by an Integrative Taxonomic Approach |
| title_full_unstemmed | Species Diversity of <i>Gelidium</i> from Southern Madagascar Evaluated by an Integrative Taxonomic Approach |
| title_short | Species Diversity of <i>Gelidium</i> from Southern Madagascar Evaluated by an Integrative Taxonomic Approach |
| title_sort | species diversity of i gelidium i from southern madagascar evaluated by an integrative taxonomic approach |
| topic | biogeography <i>cox</i>1 <i>Gelidium leptum</i> <i>G. sclerophyllum</i> <i>G. usmanghanii</i> <i>rbc</i>L |
| url | https://www.mdpi.com/1424-2818/14/10/826 |
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