Four new Planothidium species (Achnanthidiaceae, Bacillariophyceae) from the Karst region of Guizhou in China
Four new species of monoraphid diatoms belonging to the genus Planothidium were studied and described from the karst region of Guizhou Province, China. The morphological characteristics of these new species were observed and documented using light and scanning electron microscopy. Planothidium pseud...
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| Format: | Article |
| Language: | English |
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Pensoft Publishers
2025-06-01
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| Series: | PhytoKeys |
| Online Access: | https://phytokeys.pensoft.net/article/150757/download/pdf/ |
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| author | Yun Li Lin-Xin Lu Hui-Wen Zhou Pan Yu John Patrick Kociolek Wan-Ting Pang Quan-Xi Wang Qing-Min You |
| author_facet | Yun Li Lin-Xin Lu Hui-Wen Zhou Pan Yu John Patrick Kociolek Wan-Ting Pang Quan-Xi Wang Qing-Min You |
| author_sort | Yun Li |
| collection | DOAJ |
| description | Four new species of monoraphid diatoms belonging to the genus Planothidium were studied and described from the karst region of Guizhou Province, China. The morphological characteristics of these new species were observed and documented using light and scanning electron microscopy. Planothidium pseudoreichardtii sp. nov. exhibits a broad sinus at the central area on the interior of the rapheless valve, linear shallow depressions and a unique enlarged areola at the end of the striae on the exterior rapheless valve. Planothidium liboensis sp. nov. is characterized by 4–5 rows striae on both valves, a cavum at the central area on the interior rapheless valve and irregular depressions on the exterior rapheless valve. Planothidium angustirostratum sp. nov. features elliptical valves with narrowly rostrate apices, a cavum at the central area of interior rapheless valve and circular depressions on the exterior rapheless valve. Planothidium maolanensis sp. nov. has elliptical valves without protracted apices, coarsely-spaced striae on the one side of the central area of the both valves. These four new species were compared with other similar Planothidium taxa. In addition, ecological information was provided and the stability of some features was discussed. |
| format | Article |
| id | doaj-art-bc0543bc0b374c4a94ecc844c3d3edd1 |
| institution | Matheson Library |
| issn | 1314-2003 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Pensoft Publishers |
| record_format | Article |
| series | PhytoKeys |
| spelling | doaj-art-bc0543bc0b374c4a94ecc844c3d3edd12025-06-27T07:31:31ZengPensoft PublishersPhytoKeys1314-20032025-06-012598110210.3897/phytokeys.259.150757150757Four new Planothidium species (Achnanthidiaceae, Bacillariophyceae) from the Karst region of Guizhou in ChinaYun Li0Lin-Xin Lu1Hui-Wen Zhou2Pan Yu3John Patrick Kociolek4Wan-Ting Pang5Quan-Xi Wang6Qing-Min You7Shanghai Normal UniversityShanghai Normal UniversityShanghai Normal UniversityShanghai Normal UniversityUniversity of ColoradoShanghai Normal UniversityShanghai Normal UniversityShanghai Normal UniversityFour new species of monoraphid diatoms belonging to the genus Planothidium were studied and described from the karst region of Guizhou Province, China. The morphological characteristics of these new species were observed and documented using light and scanning electron microscopy. Planothidium pseudoreichardtii sp. nov. exhibits a broad sinus at the central area on the interior of the rapheless valve, linear shallow depressions and a unique enlarged areola at the end of the striae on the exterior rapheless valve. Planothidium liboensis sp. nov. is characterized by 4–5 rows striae on both valves, a cavum at the central area on the interior rapheless valve and irregular depressions on the exterior rapheless valve. Planothidium angustirostratum sp. nov. features elliptical valves with narrowly rostrate apices, a cavum at the central area of interior rapheless valve and circular depressions on the exterior rapheless valve. Planothidium maolanensis sp. nov. has elliptical valves without protracted apices, coarsely-spaced striae on the one side of the central area of the both valves. These four new species were compared with other similar Planothidium taxa. In addition, ecological information was provided and the stability of some features was discussed.https://phytokeys.pensoft.net/article/150757/download/pdf/ |
| spellingShingle | Yun Li Lin-Xin Lu Hui-Wen Zhou Pan Yu John Patrick Kociolek Wan-Ting Pang Quan-Xi Wang Qing-Min You Four new Planothidium species (Achnanthidiaceae, Bacillariophyceae) from the Karst region of Guizhou in China PhytoKeys |
| title | Four new Planothidium species (Achnanthidiaceae, Bacillariophyceae) from the Karst region of Guizhou in China |
| title_full | Four new Planothidium species (Achnanthidiaceae, Bacillariophyceae) from the Karst region of Guizhou in China |
| title_fullStr | Four new Planothidium species (Achnanthidiaceae, Bacillariophyceae) from the Karst region of Guizhou in China |
| title_full_unstemmed | Four new Planothidium species (Achnanthidiaceae, Bacillariophyceae) from the Karst region of Guizhou in China |
| title_short | Four new Planothidium species (Achnanthidiaceae, Bacillariophyceae) from the Karst region of Guizhou in China |
| title_sort | four new planothidium species achnanthidiaceae bacillariophyceae from the karst region of guizhou in china |
| url | https://phytokeys.pensoft.net/article/150757/download/pdf/ |
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