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Insights Into the Phylogeny of the Genus Stentor (Heterotrichea, Ciliophora) with Special Emphasis on the Evolution of the Macronucleus Based on SSU rDNA Data
並列摘要
Representatives of the genus Stentor (Stentoridae, Heterotrichea) are striking ciliates in environmental water samples because of their size (up to 4 mm) and their trumpet-like shape. Important for species identification are the following main characteristics: (1) the presence or absence of endosymbiotic algae (zoochlorellae); (2) the colour of the pigmented cortical granules, and (3) the shape of the macronucleus. The complete small subunit rDNA (SSU rDNA) of 19 further representatives of the genus Stentor was sequenced to examine the phylogenetic relationships within this genus and to determine the taxonomic value of these main characteristics. The detailed phylogenetic analyses yielded a separation of all species possessing a single compact macronucleus from those species with an ”elongated” macronucleus (moniliform or vermiform). The data also indicate that the uptake of algae as well as the loss of pigmentation happened independently in different lineages. Furthermore, a high level of intraspecific variation within several species was found. Thus, S. muelleri and S. (sp.) cf. katashimai appear to represent distinct species and S. multiformis is composed of a species complex.
延伸閱讀
- Xu, Y., Li, L. F., Fan, X. P., Pan, H. B., gu, F. K., & Farraj, S. A. A. (2015). Systematic Analyses of the Genus Architricha and Pleurotricha curdsi (Ciliophora, Oxytrichidae), with Redescriptions of Their Morphology. Acta Protozoologica, 54(3), 183-193. https://doi.org/10.4467/16890027AP.15.015.3212
- Chen, Z. G., & Song, W. B. (2002). Phylogenetic Positions of Aspidisca steini and Euplotes vannus Within the Order Euplotida (Hypotrichia: Ciliophora) Inferred from Complete Small Subunit Ribosomal RNA Gene Sequences. Acta Protozoologica, 41(1), 1-9. https://www.airitilibrary.com/Article/Detail?DocID=00651583-200203-201012290004-201012290004-1-9
- Cameron, S. L., & O'donoghue, P. J. (2004). Morphometric and Cladistic Analyses of the Phylogeny of Macropodinium (Ciliophora: Litostomatea: Macropodiniidae). Acta Protozoologica, 43(1), 43-53. https://www.airitilibrary.com/Article/Detail?DocID=00651583-200403-201012290012-201012290012-43-53
- LIU, M., LI, L., QU, Z., LUO, X., FARRAJ, S. A. A., LIN, X., & HU, X. (2017). Morphological Redescription and SSU rDNA-based Phylogeny of Two Freshwater Ciliates, Uronema nigricans and Lembadion lucens (Ciliophora, Oligohymenophorea), with Discussion on the Taxonomic Status of Uronemita sinensis. Acta Protozoologica, 56(1), 17-37. https://doi.org/10.4467/16890027AP.17.003.6967
- 洪吏院（2008）。Morphological and Molecular Evidence for a Stepwise Terrestrial Evolution and Species Delimitation on the Coenobita Phylogeny〔碩士論文，國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342/NTU.2008.00954