Reconsideration of the phylogenetic positions of three stichotrichous genera Holosticha,Anteholosticha and Pseudokeronopsis (Spirotrichea:Ciliophora) inferred from complete SSU rRNA gene sequences  

作　　者：Lifang Li Weibo Song Mann Kyoon Shin Alan Warren Khaled A.S. Al-Rasheid Abdulaziz A. Al-Khedhairy Saud Al-Arifi 

机构地区：[1]Marine College, Shandong University at Weihai, Weihai 264209, China [2]Laboratory of Protozoology, KLM, Ocean University of China, Qingdao 266003, China [3]Department of Biology, University of Ulsan, Ulsan 680-749, Korea [4]Department of Zoology, The Natural History Museum, Cromwell Road, London SW7 5BD, UK [5]Zoology Department, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia

出　　处：《Progress in Natural Science:Materials International》2009年第6期769-773,共5页自然科学进展·国际材料（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.30670280 and 40676076);partially supported by the Center of Excellence in Biodiversity Research and the DNA Research Chair,King Saud University

摘　　要：The small subunit rRNA (SSU rRNA) gene for six marine stichotrichs, Pseudokeronopsis carnea, P. flava, Holosticha heterofoissneri, H. diademata, H. bradburyae and Anteholosticha manca, was sequenced and characterized. Using this molecular information, the phylogenetic positions of three related genera, Pseudokeronopsis, Holosticha and Anteholosticha were determined. The results indicate that the family Urostylidae is clearly separated from the family Pseudokeronopsidae. The present phylogenetic analyses unambiguously placed Pseudokeronopsis close to Holosticha, and support the conclusion that these genera should be regarded as the members of the order Urostylidae within the stichotrich clade. Furthermore, the results of this study also support the monophyly of the genus Pseud-okeronopsis, the redefinition of Holosticha s. str. and the placement of Anteholosticha in a clade separate from Holosticha.The small subunit rRNA （SSU rRNA） gene for six marine stichotrichs, Pseudokeronopsis carnea, P. flava, Holosticha heterofoissneri, H. diademata, H. bradburyae and Anteholosticha manca, was sequenced and characterized. Using this molecular information, the phylogenetic positions of three related genera, Pseudokeronopsis, Holosticha and Anteholosticha were determined. The results indicate that the family Urostylidae is clearly separated from the family Pseudokeronopsidae. The present phylogenetic analyses unambiguously placed Pseudokeronopsis close to Holosticha, and support the conclusion that these genera should be regarded as the members of the order Urostylidae within the stichotrich clade. Furthermore, the results of this study also support the monophyly of the genus Pseudokeronopsis, the redefinition of Holosticha s. str. and the placement of Anteholosticha in a clade separate from Holosticha.

关 键 词：Urostylidae CLADE Evolution TAXONOMY 

分 类 号：Q965.8[生物学—昆虫学] Q959.4