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

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	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
	Zhan, Zifeng 1; Xu, Kuidong 1; Warren, Alan 2; Gong, Yingchun 3
刊名	JOURNAL OF EUKARYOTIC MICROBIOLOGY
	2009-11-01
卷号	56 期号:6 页码:552-558
关键词	Mobilida molecular systematics Peritrichida Sessilida Trichodina Urceolaria urechi
ISSN号	1066-5234
通讯作者	Xu, KD, Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
中文摘要	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.
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.
学科主题	Microbiology
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Microbiology
研究领域[WOS]	Microbiology
关键词[WOS]	TRICHODINID ECTOPARASITES CILIOPHORA ; PEDICULUS CILIOPHORA ; MAXIMUM-LIKELIHOOD ; MORPHOLOGY ; EHRENBERG ; INFERENCE ; SESSILIDA ; MOLLUSKS ; PROTOZOA ; GILLS
收录类别	SCI
资助信息	Chinese Academy of Sciences [KZCX2-YW-417]; National Natural Science Foundation of China [40576072]
语种	英语
WOS记录号	WOS:000271188700006
公开日期	2010-10-13
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/152342/7534]
专题	水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文
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
推荐引用方式 GB/T 7714	Zhan, Zifeng,Xu, Kuidong,Warren, Alan,et al. 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[J]. JOURNAL OF EUKARYOTIC MICROBIOLOGY,2009,56(6):552-558.
APA	Zhan, Zifeng,Xu, Kuidong,Warren, Alan,&Gong, Yingchun.(2009).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,56(6),552-558.
MLA	Zhan, Zifeng,et al."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 56.6(2009):552-558.