<i>Cyclotella</i> or <i>Discostella</i>? An Evaluation of the Morphological and Molecular Evidence Regarding the Generic Placement of a Centric Diatom from Eastern Asia and the Creation of <i>Discocyclus</i> gen. nov.
In this study on diatoms, which are unicellular microalgae with a siliceous cell wall, images obtained by electron microscopy were used to compare three taxa from East Asia that were referred as <i>Cyclotella hubeiana</i>, <i>Discostella guiyangensis</i> and “<i>Cyclote...
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2025-03-01
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| author | Patrick Rioual Konrad Schultz Gyeongje Joh Mengna Liao |
| author_facet | Patrick Rioual Konrad Schultz Gyeongje Joh Mengna Liao |
| author_sort | Patrick Rioual |
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| description | In this study on diatoms, which are unicellular microalgae with a siliceous cell wall, images obtained by electron microscopy were used to compare three taxa from East Asia that were referred as <i>Cyclotella hubeiana</i>, <i>Discostella guiyangensis</i> and “<i>Cyclotella fottii</i>” in the original studies. Morphometrical and morphological analyses indicate that these three taxa are conspecific. The distinctive morphological features of this species are the following: one rimoportula located on the valve mantle within the ring of marginal fultoportulae, marginal fultoportulae situated on costae with internally two satellite pores positioned circumferentially (laterally) and externally long tubular opening, biseriate striae and branching costae. A comparison of these morphological features with those of <i>Discostella</i> and <i>Cyclotella</i> species and a re-assessment of the existing molecular data suggest that this species could be separated from both these genera. On this basis, we describe the new genus <i>Discocyclus</i> gen. nov. with <i>Discocyclus hubeianus</i> comb. nov. as the type species. |
| format | Article |
| id | doaj-art-f67aa7f15b95426fab90bf3f3fb78d15 |
| institution | Matheson Library |
| issn | 2673-6500 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
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| series | Taxonomy |
| spelling | doaj-art-f67aa7f15b95426fab90bf3f3fb78d152025-06-25T14:28:02ZengMDPI AGTaxonomy2673-65002025-03-01521710.3390/taxonomy5020017<i>Cyclotella</i> or <i>Discostella</i>? An Evaluation of the Morphological and Molecular Evidence Regarding the Generic Placement of a Centric Diatom from Eastern Asia and the Creation of <i>Discocyclus</i> gen. nov.Patrick Rioual0Konrad Schultz1Gyeongje Joh2Mengna Liao3State Key Laboratory of Lithospheric and Environmental Coevolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaApplied Ecology & Phycology, University of Rostock, 18051 Rostock, GermanyDepartment of Environmental Sciences and Engineering, Inje University, Gimhae 621-749, Republic of KoreaCollege of Life Sciences, Zhejiang Normal University, Jinhua 321004, ChinaIn this study on diatoms, which are unicellular microalgae with a siliceous cell wall, images obtained by electron microscopy were used to compare three taxa from East Asia that were referred as <i>Cyclotella hubeiana</i>, <i>Discostella guiyangensis</i> and “<i>Cyclotella fottii</i>” in the original studies. Morphometrical and morphological analyses indicate that these three taxa are conspecific. The distinctive morphological features of this species are the following: one rimoportula located on the valve mantle within the ring of marginal fultoportulae, marginal fultoportulae situated on costae with internally two satellite pores positioned circumferentially (laterally) and externally long tubular opening, biseriate striae and branching costae. A comparison of these morphological features with those of <i>Discostella</i> and <i>Cyclotella</i> species and a re-assessment of the existing molecular data suggest that this species could be separated from both these genera. On this basis, we describe the new genus <i>Discocyclus</i> gen. nov. with <i>Discocyclus hubeianus</i> comb. nov. as the type species.https://www.mdpi.com/2673-6500/5/2/17morphological analysismorphometry<i>Discocyclus</i> gen. nov.<i>Discocyclus hubeianus</i> comb. nov.<i>Cyclotella hubeiana</i><i>Discostella guiyangensis</i> |
| spellingShingle | Patrick Rioual Konrad Schultz Gyeongje Joh Mengna Liao <i>Cyclotella</i> or <i>Discostella</i>? An Evaluation of the Morphological and Molecular Evidence Regarding the Generic Placement of a Centric Diatom from Eastern Asia and the Creation of <i>Discocyclus</i> gen. nov. Taxonomy morphological analysis morphometry <i>Discocyclus</i> gen. nov. <i>Discocyclus hubeianus</i> comb. nov. <i>Cyclotella hubeiana</i> <i>Discostella guiyangensis</i> |
| title | <i>Cyclotella</i> or <i>Discostella</i>? An Evaluation of the Morphological and Molecular Evidence Regarding the Generic Placement of a Centric Diatom from Eastern Asia and the Creation of <i>Discocyclus</i> gen. nov. |
| title_full | <i>Cyclotella</i> or <i>Discostella</i>? An Evaluation of the Morphological and Molecular Evidence Regarding the Generic Placement of a Centric Diatom from Eastern Asia and the Creation of <i>Discocyclus</i> gen. nov. |
| title_fullStr | <i>Cyclotella</i> or <i>Discostella</i>? An Evaluation of the Morphological and Molecular Evidence Regarding the Generic Placement of a Centric Diatom from Eastern Asia and the Creation of <i>Discocyclus</i> gen. nov. |
| title_full_unstemmed | <i>Cyclotella</i> or <i>Discostella</i>? An Evaluation of the Morphological and Molecular Evidence Regarding the Generic Placement of a Centric Diatom from Eastern Asia and the Creation of <i>Discocyclus</i> gen. nov. |
| title_short | <i>Cyclotella</i> or <i>Discostella</i>? An Evaluation of the Morphological and Molecular Evidence Regarding the Generic Placement of a Centric Diatom from Eastern Asia and the Creation of <i>Discocyclus</i> gen. nov. |
| title_sort | i cyclotella i or i discostella i an evaluation of the morphological and molecular evidence regarding the generic placement of a centric diatom from eastern asia and the creation of i discocyclus i gen nov |
| topic | morphological analysis morphometry <i>Discocyclus</i> gen. nov. <i>Discocyclus hubeianus</i> comb. nov. <i>Cyclotella hubeiana</i> <i>Discostella guiyangensis</i> |
| url | https://www.mdpi.com/2673-6500/5/2/17 |
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