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学科主题: Microbiology
题名: Reconsideration of Phylogenetic Relationships of the Subclass Peritrichia (Ciliophora, Oligohymenophorea) Based on Small Subunit Ribosomal RNA Gene Sequences, with the Establishment of a New Subclass Mobilia Kahl, 1933
作者: Zhan, Zifeng1; Xu, Kuidong1; Warren, Alan2; Gong, Yingchun3
通讯作者: Xu, KD, Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
关键词: Mobilida ; molecular systematics ; Peritrichida ; Sessilida ; Trichodina ; Urceolaria urechi
刊名: JOURNAL OF EUKARYOTIC MICROBIOLOGY
发表日期: 2009-11-01
DOI: 10.1111/j.1550-7408.2009.00435.x
卷: 56, 期:6, 页:552-558
收录类别: SCI
文章类型: Article
部门归属: [Zhan, Zifeng; Xu, Kuidong] Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China; [Warren, Alan] Nat Hist Museum, Dept Zool, London SW7 5BD, England; [Gong, Yingchun] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: Chinese Academy of Sciences [KZCX2-YW-417]; National Natural Science Foundation of China [40576072]
类目[WOS]: Microbiology
研究领域[WOS]: Microbiology
摘要: Based on its characteristic oral apparatus, the ciliate subclass Peritrichia has long been recognized as a monophyletic assemblage composed of the orders Mobilida and Sessilida. Following the application of molecular methods, the monophyly of Peritrichia has recently been questioned. We investigated the phylogenetic relationships of the peritrichous ciliates based on four further complete small subunit ribosomal RNA sequences of mobilids, namely Urceolaria urechi, Trichodina meretricis, Trichodina sinonovaculae, and Trichodina ruditapicis. In all phylogenetic trees, the mobilids never clustered with the sessilids, but instead formed a monophyletic assemblage related to the peniculines. By contrast, the sessilids formed a sister clade with the hymenostomes at a terminal position within the Oligohymenophorea. We therefore formally separate the mobilids from the sessilids (Peritrichia sensu stricto) and establish a new subclass, Mobilia Kahl, 1933, which contains the order Mobilida Kahl, 1933. We argue that the oral apparatus in the mobilians and sessilid peritrichs is a homoplasy, probably due to convergent evolution driven by their similar life-styles and feeding strategies. Morphologically, the mobilians are distinguished from all other oligohymenophoreans by the presence of the adhesive disc, this character being a synapomorphy for the Mobilia.
英文摘要: Based on its characteristic oral apparatus, the ciliate subclass Peritrichia has long been recognized as a monophyletic assemblage composed of the orders Mobilida and Sessilida. Following the application of molecular methods, the monophyly of Peritrichia has recently been questioned. We investigated the phylogenetic relationships of the peritrichous ciliates based on four further complete small subunit ribosomal RNA sequences of mobilids, namely Urceolaria urechi, Trichodina meretricis, Trichodina sinonovaculae, and Trichodina ruditapicis. In all phylogenetic trees, the mobilids never clustered with the sessilids, but instead formed a monophyletic assemblage related to the peniculines. By contrast, the sessilids formed a sister clade with the hymenostomes at a terminal position within the Oligohymenophorea. We therefore formally separate the mobilids from the sessilids (Peritrichia sensu stricto) and establish a new subclass, Mobilia Kahl, 1933, which contains the order Mobilida Kahl, 1933. We argue that the oral apparatus in the mobilians and sessilid peritrichs is a homoplasy, probably due to convergent evolution driven by their similar life-styles and feeding strategies. Morphologically, the mobilians are distinguished from all other oligohymenophoreans by the presence of the adhesive disc, this character being a synapomorphy for the Mobilia.
关键词[WOS]: TRICHODINID ECTOPARASITES CILIOPHORA ; PEDICULUS CILIOPHORA ; MAXIMUM-LIKELIHOOD ; MORPHOLOGY ; EHRENBERG ; INFERENCE ; SESSILIDA ; MOLLUSKS ; PROTOZOA ; GILLS
语种: 英语
WOS记录号: WOS:000271188700006
ISSN号: 1066-5234
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/152342/7534
Appears in Collections:中科院水生所知识产出(2009年前)_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
2.Nat Hist Museum, Dept Zool, London SW7 5BD, England
3.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China

Recommended Citation:
Zhan, Zifeng; Xu, Kuidong; Warren, Alan; Gong, Yingchun.Reconsideration of Phylogenetic Relationships of the Subclass Peritrichia (Ciliophora, Oligohymenophorea) Based on Small Subunit Ribosomal RNA Gene Sequences, with the Establishment of a New Subclass Mobilia Kahl, 1933,JOURNAL OF EUKARYOTIC MICROBIOLOGY,2009,56(6):552-558
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