Systematic positions and taxonomy of two freshwater ciliates found in China, with establishments of one new family and two new species (Ciliophora, Oligohymenophorea)
The morphology and molecular phylogeny of two freshwater ciliates, Pseudotetrahymena orientalis gen. et sp. nov. and Cyclidium paravorax sp. nov., collected from Harbin, Northeast China, were investigated based on morphology of live specimens and ciliary pattern; the phylogenetic placements were in...
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Consortium of European Natural History Museums
2025-03-01
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| Series: | European Journal of Taxonomy |
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| Online Access: | https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/2813 |
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| author | Xiang Wang Lihui Liu Jialu Wang Xiaosong Wang Jiarui Wang Li Wang Lv Zhao Xuming Pan |
| author_facet | Xiang Wang Lihui Liu Jialu Wang Xiaosong Wang Jiarui Wang Li Wang Lv Zhao Xuming Pan |
| author_sort | Xiang Wang |
| collection | DOAJ |
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The morphology and molecular phylogeny of two freshwater ciliates, Pseudotetrahymena orientalis gen. et sp. nov. and Cyclidium paravorax sp. nov., collected from Harbin, Northeast China, were investigated based on morphology of live specimens and ciliary pattern; the phylogenetic placements were inferred from the SSU-rRNA gene. Pseudotetrahymenidae fam. nov., assigned to the order Tetrahymenida Fauré-Fremiet in Corliss, 1956, can be distinguished from the other families by its membranelle 2 consisting of several clusters and the shape of the cell. The new species C. paravorax is similar to C. vorax Pan, 2020 in most morphological features except the membranelle 3, which is single-rowed. Phylogenetic analyses based on SSU-rRNA gene sequence indicate that Pseudotetrahymenidae lies in the periphery of the Tetrahymenida clade and forms an independent, fully supported clade. Cyclidium paravorax groups with C. glaucoma Müller, 1773, which supports the assignment of the new species to the genus Cyclidium Müller, 1773.
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| format | Article |
| id | doaj-art-e49e6ba8c0ac4d00abcb7f148afde262 |
| institution | DOAJ |
| issn | 2118-9773 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Consortium of European Natural History Museums |
| record_format | Article |
| series | European Journal of Taxonomy |
| spelling | doaj-art-e49e6ba8c0ac4d00abcb7f148afde2622025-08-20T03:15:26ZengConsortium of European Natural History MuseumsEuropean Journal of Taxonomy2118-97732025-03-01981110.5852/ejt.2025.981.2813Systematic positions and taxonomy of two freshwater ciliates found in China, with establishments of one new family and two new species (Ciliophora, Oligohymenophorea)Xiang Wang0Lihui Liu1Jialu Wang2Xiaosong Wang3Jiarui Wang4Li Wang5Lv Zhao6Xuming Pan7Laboratory of Protozoology, Harbin Normal University, Harbin 150025, ChinaLaboratory of Protozoology, Harbin Normal University, Harbin 150025, ChinaLaboratory of Protozoology, Harbin Normal University, Harbin 150025, ChinaLaboratory of Protozoology, Harbin Normal University, Harbin 150025, ChinaLaboratory of Protozoology, Harbin Normal University, Harbin 150025, ChinaLaboratory of Protozoology, Harbin Normal University, Harbin 150025, ChinaDepartment of Clinical Laboratory, Xian International Medical Center Hospital, Xi’an 710100, ChinaLaboratory of Protozoology, Harbin Normal University, Harbin 150025, China The morphology and molecular phylogeny of two freshwater ciliates, Pseudotetrahymena orientalis gen. et sp. nov. and Cyclidium paravorax sp. nov., collected from Harbin, Northeast China, were investigated based on morphology of live specimens and ciliary pattern; the phylogenetic placements were inferred from the SSU-rRNA gene. Pseudotetrahymenidae fam. nov., assigned to the order Tetrahymenida Fauré-Fremiet in Corliss, 1956, can be distinguished from the other families by its membranelle 2 consisting of several clusters and the shape of the cell. The new species C. paravorax is similar to C. vorax Pan, 2020 in most morphological features except the membranelle 3, which is single-rowed. Phylogenetic analyses based on SSU-rRNA gene sequence indicate that Pseudotetrahymenidae lies in the periphery of the Tetrahymenida clade and forms an independent, fully supported clade. Cyclidium paravorax groups with C. glaucoma Müller, 1773, which supports the assignment of the new species to the genus Cyclidium Müller, 1773. https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/2813Pseudotetrahymena orientalis gen. et sp. nov.Cyclidium paravorax sp. nov.morphology |
| spellingShingle | Xiang Wang Lihui Liu Jialu Wang Xiaosong Wang Jiarui Wang Li Wang Lv Zhao Xuming Pan Systematic positions and taxonomy of two freshwater ciliates found in China, with establishments of one new family and two new species (Ciliophora, Oligohymenophorea) European Journal of Taxonomy Pseudotetrahymena orientalis gen. et sp. nov. Cyclidium paravorax sp. nov. morphology |
| title | Systematic positions and taxonomy of two freshwater ciliates found in China, with establishments of one new family and two new species (Ciliophora, Oligohymenophorea) |
| title_full | Systematic positions and taxonomy of two freshwater ciliates found in China, with establishments of one new family and two new species (Ciliophora, Oligohymenophorea) |
| title_fullStr | Systematic positions and taxonomy of two freshwater ciliates found in China, with establishments of one new family and two new species (Ciliophora, Oligohymenophorea) |
| title_full_unstemmed | Systematic positions and taxonomy of two freshwater ciliates found in China, with establishments of one new family and two new species (Ciliophora, Oligohymenophorea) |
| title_short | Systematic positions and taxonomy of two freshwater ciliates found in China, with establishments of one new family and two new species (Ciliophora, Oligohymenophorea) |
| title_sort | systematic positions and taxonomy of two freshwater ciliates found in china with establishments of one new family and two new species ciliophora oligohymenophorea |
| topic | Pseudotetrahymena orientalis gen. et sp. nov. Cyclidium paravorax sp. nov. morphology |
| url | https://europeanjournaloftaxonomy.eu/index.php/ejt/article/view/2813 |
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