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Ontogenesis and systematic position of a new hypotrichous ciliate,Chaetospira sinica ***.,with an improved diagnosis of the poorly defined family Chaetospiridae Jankowski,1985(Protozoa,Ciliophora,Hypotrichia)

引用

Marine Life Science & Technology 2022年第4期4卷 513-526页

作者： Wenya Song Xiaotian Luo Yong Chi Saleh A.Al-Farraj Chen Shao Laboratory of Protozoological Biodiversity and Evolution in Wetland College of Life SciencesShaanxi Normal UniversityXi’an710119China Institute of Evolution&Marine Biodiversity Ocean University of ChinaQingdao266003China Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences Institute of HydrobiologyChinese Academy of SciencesWuhan430072China Zoology Department College of ScienceKing Saud UniversityRiyadh11451Saudi Arabia

Ciliates are unique single-celled organisms that play important roles in ecological,environmental,evolutionary,and ontogenetic *** the present study,phylogenetic analyses based on 18S rRNA gene sequence data reveal that Chaetospira sinica *** with stichotricha aculeata with strong to full support(97%ML,1.00 BI),but is not closely related to members of spirofilidae Gelei,1929 to which Chaetospira and stichotricha have previously been *** analyses,together with morphological and morphogenetic data from Chaetospira sinica ***.,support the validity of family Chaetospiridae Jankowski,*** and stichotricha are here assigned to the family Chaetospiridae,the improved diagnosis of which is as follows:non-dorsomarginalian Hypotrichia with flask-shaped body;oral region extending along narrow anterior neck region;lorica usually present;two ventral and two marginal cirral rows,all distinctly spiraled or obliquely curved;pretransverse and transverse cirri *** basic morphogenetic features in *** *** be summarized as:(1)the oral primordium for the opisthe develops de novo and the parental adoral zone is completely retained by the proter;(2)all ventral cirral anlagen and marginal anlagen developed intrakinetally;(3)three dorsal kineties anlagen formed intrakinetally in each daughter cell;and(4)macronuclear nodules fuse into a single *** cells were also isolated and their morphologic and molecular data are provided.

关键词： 18S rRNA gene Morphogenesis Phylogeny spirofilidae-stichotricha

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