Phylogenetic position of three Condylostoma species(Protozoa,Ciliophora,Heterotricheal inferred from the small subunit rRNA gene sequence |
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Authors: | Wenbo Guo Weibo Song Khaled ASA-Rasheid Chen Shao Miao Miao Saleh AA-Farraj Saleh AA-Qurishy Zigui Chen Zhenzhen Yi Shan Gao |
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Institution: | 1. Laboratory of Protozoology,Ocean University of China,Minxing Building B,5 Yushan Road,Qingdao 266003,China 2. Zoology Department,King Saud University,Riyadh 11451,Saudi Arabia |
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Abstract: | The systematically poorly known ciliate genus Conadylostoma was erected by Vincent in 1826.About 10 morphotypes have been reported,but any molecular investigations concerning this group SO far are lacking.In this work,the small subunit ribosomal RNA (SS rRNA)gene of three marine Conaylostoma species was sequenced,by which the phylogenetic trees were constructed by distance-matrix,maximum parsimony and Bayesian inference methods.The results show that(1)all the trees have similar topologies with high supports;(2)Condylostoma is mostly related to the genus Condylostentor;and(3)three Condylostoma species as well as Conadylostentor auriculatus cluster together and form a sister group with other heterotrichs.This is moderately consistent with the assessment of phylo-genetic relationships of Conaylostoma-related heterotrichs from the morphological information.The phylogenetic relationship of some other related heterotrichs,Peritromus,Fotlictllina,Stentor and Blepharisma,has been also discussed. |
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Keywords: | Mafine ciliates Condylostoma SS rRNA Phylogeny Heterotrichs |
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