期刊
EUROPEAN JOURNAL OF PROTISTOLOGY
卷 44, 期 3, 页码 168-180出版社
ELSEVIER GMBH
DOI: 10.1016/j.ejop.2007.11.004
关键词
Cyclidium glaucoma; ciliate; identification; barcode; sewage; species concept
类别
A strain of Cyclidium isolated from a sewage treatment plant in Geneva. Switzerland, was cloned and cultured under laboratory conditions before being characterized cytologically and molecularly. information about the classical morphology and also about new molecular sequences has been obtained permitting its identification as Cyclidium glaucoma. The molecular description includes the 18S rRNA sequence, and for the first time for C. glaucoma the ITS-1, 5.8S, ITS-2 sequence, and the mitochondrial Cytochrome oxidase C subunit I sequence. Three divergence groups were identified for C. glaucoma using a short rDNA sequence for evolutionary distance analysis. These groups correspond to the three ribotype lineages previously described for C. glaucoma. We discuss the possibility that C glaucoma is a species complex containing three cryptic species, the problems of species definition in the protozoa and the choice of a barcoding molecule for the ciliates. (c) 2007 Elsevier GmbH. All rights reserved.
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