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Systematics and Molecular Phylogeny of the Ciliate Genus Pseudokeronopsis (Ciliophora, Hypotrichia)
Li, Ju1; Zhan, Zifeng1; Xu, Kuidong1,2,3
2017-11-01
Source PublicationJOURNAL OF EUKARYOTIC MICROBIOLOGY
Volume64Issue:6Pages:850-872
SubtypeArticle
AbstractA still challenging study on ciliate systematics is to clarify the taxonomic and phylogenetic confusions of the fascinating pigmented Pseudokeronopsis species because of their high interspecific similarities. We evaluated the identities and internal relationships within Pseudokeronopsis based on morphological descriptions in combination with the 18S and ITS-5.8S rDNA genetic distances, ITS2 secondary structures and phylogenetic analyses. Results showed that (1) Pseudokeronopsis pararubra, a species ever synonymized as Pseudokeronopsis carnea, is a valid species; (2) most Chinese populations identified as Pseudokeronopsis rubra represent a new species namely Pseudokeronopsis songi sp. nov.; (3) within Pseudokeronopsis, P. carnea branched early, while P. songi sp. nov., P. flava, and P. erythrina showed close relationships and formed a sister clade with P. pararubra; (4) compared to 18S and ITS2 rDNA, ITS-5.8S rDNA is more suitable for separating Pseudokeronopsis species, with pairwise distances of 0-0.0441 at the intraspecific level and 0.0635-0.1150 at the interspecific level; and (5) the core structure of Pseudokeronopsis ITS2 includes three helices, with helix III being the longest and showing an identical pattern in conspecific populations and small differences among species. Based on the evaluation, we clarify all misidentified and dubious 18S and ITS-5.8S rDNA sequences of Pseudokeronopsis in GenBank.
KeywordMultiloci New Species Revision Secondary Structure Taxonomy Urostylid
DOI10.1111/jeu.12420
Indexed BySCI
Language英语
WOS IDWOS:000415179600012
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/143078
Collection海洋生物标本馆
海洋生物分类与系统演化实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Dept Marine Organism Taxon & Phylogeny, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao 266071, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author Affilication中国科学院海洋研究所
Recommended Citation
GB/T 7714
Li, Ju,Zhan, Zifeng,Xu, Kuidong. Systematics and Molecular Phylogeny of the Ciliate Genus Pseudokeronopsis (Ciliophora, Hypotrichia)[J]. JOURNAL OF EUKARYOTIC MICROBIOLOGY,2017,64(6):850-872.
APA Li, Ju,Zhan, Zifeng,&Xu, Kuidong.(2017).Systematics and Molecular Phylogeny of the Ciliate Genus Pseudokeronopsis (Ciliophora, Hypotrichia).JOURNAL OF EUKARYOTIC MICROBIOLOGY,64(6),850-872.
MLA Li, Ju,et al."Systematics and Molecular Phylogeny of the Ciliate Genus Pseudokeronopsis (Ciliophora, Hypotrichia)".JOURNAL OF EUKARYOTIC MICROBIOLOGY 64.6(2017):850-872.
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