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Integrative taxonomy and molecular phylogeny of three poorly known tintinnine ciliates, with the establishment of a new genus (Protista; Ciliophora; Oligotrichea)

التفاصيل البيبلوغرافية
العنوان: Integrative taxonomy and molecular phylogeny of three poorly known tintinnine ciliates, with the establishment of a new genus (Protista; Ciliophora; Oligotrichea)
المؤلفون: Rui Wang, Yang Bai, Tao Hu, Dapeng Xu, Toshikazu Suzuki, Xiaozhong Hu
المصدر: BMC Ecology and Evolution, Vol 21, Iss 1, Pp 1-23 (2021)
بيانات النشر: BMC, 2021.
سنة النشر: 2021
المجموعة: LCC:Ecology
LCC:Evolution
مصطلحات موضوعية: Biodiversity, loricate ciliates, new combination, new genus, rDNA, Tintinnina, Ecology, QH540-549.5, Evolution, QH359-425
الوصف: Abstract Background The taxonomic classification of the suborder Tintinnina Kofoid & Campbell, 1929, a species-rich group of planktonic ciliated protistans with a characteristic lorica, has long been ambiguous largely due to the lack of cytological and molecular data for most species. Tintinnopsis is the largest, most widespread, and most taxonomically complex genus within this group with about 170 species occurring in nearshore waters. Previous molecular phylogenetic studies have revealed that Tintinnopsis is polyphyletic. Results Here we document the live morphology, infraciliature, gene sequences, and habitat characteristics of three poorly known tintinnine species, viz. Tintinnopsis karajacensis Brandt, 1896, Tintinnopsis gracilis Kofoid & Campbell, 1929, and Tintinnopsis tocantinensis Kofoid & Campbell, 1929, isolated from the coastal waters of China. Based on a unique cytological feature (i.e., an elongated ciliary tuft with densely arranged kinetids) in the former two species, Antetintinnopsis gen. nov. is erected with Antetintinnopsis hemispiralis (Yin, 1956) comb. nov. (original combination: Tintinnopsis hemispiralis Yin, 1956) designated as the type species. Moreover, A. karajacensis (Brandt, 1896) comb. nov. (original combination: Tintinnopsis karajacensis Brandt, 1896) and A. gracilis (Kofoid & Campbell, 1929) comb. nov. (original combination: Tintinnopsis gracilis Kofoid & Campbell, 1929) are placed in a highly supported clade that branches separately from Tintinnopsis clades in phylogenetic trees based on SSU rDNA and LSU rDNA sequence data, thus supporting the establishment of the new genus. One other species is assigned to Antetintinnopsis gen. nov., namely A. subacuta (Jörgensen, 1899) comb. nov. (original combination Tintinnopsis subacuta Jörgensen, 1899). Conclusions The findings of the phylogenetic analyses support the assertion that cytological characters are taxonomically informative for tintinnines. This study also contributes to the broadening of our understanding of the tintinnine biodiversity and evolution.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2730-7182
Relation: https://doaj.org/toc/2730-7182
DOI: 10.1186/s12862-021-01831-8
URL الوصول: https://doaj.org/article/3ffc7247cb8a414a8d7888a8546a4dce
رقم الأكسشن: edsdoj.3ffc7247cb8a414a8d7888a8546a4dce
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:27307182
DOI:10.1186/s12862-021-01831-8