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The insights into the systematic relationship of Gastrostyla-affinitive genera, with report on a new saline soil ciliate genus and new species (Protozoa, Ciliophora)
Lu,Xiaoteng1,2,3; Wang,Yuanyuan3; Al-Farraj,Saleh A.4; El-Serehy,Hamed4; Huang,Jie5; Shao,Chen1
2020-07-29
Source PublicationBMC Evolutionary Biology
Volume20Issue:1Pages:1-14
Abstract

AbstractBackgroundHypotrichia are a group with the most complex morphology and morphogenesis within the ciliated protists. The classification of Gastrostyla-like species, a taxonomically difficult group of hypotrichs with a common ventral cirral pattern but various dorsal and ontogenetic patterns, is poorly understood. Hence, systematic relationships within this group and with other taxa in the subclass Hypotrichia remain unresolved.Results18S rRNA gene sequence of a new Gastrostyla-like taxon was obtained. Phylogenetic analyses based on the 18S rRNA gene sequences indicate that this ciliate represents a new genus that is closely related to Heterourosomoida and Kleinstyla within the oxytrichid clade of the Hypotrichia. However, the position of this cluster remains unresolved. All three genera deviate from the typical oxytrichids by their incomplete (or lack of) dorsal kinety fragmentation during morphogenesis. Morphology and morphogenesis of this newly discovered form, Heterogastrostyla salina nov. gen., nov. spec., are described. Heterogastrostyla nov. gen., is characterised as follows: more than 18 fronto-ventral-transverse cirri, cirral anlagen V and VI develop pretransverse cirri, and dorsal ciliature in Urosomoida-like pattern.ConclusionsSimilar to the CEUU-hypothesis about convergent evolution of urostylids and uroleptids, we speculate that the shared ventral cirral patterns of Gastrostyla-like taxa might have resulted from convergent evolution.

KeywordConvergent evolution, Gastrostyla, morphogenesis, new genus, new species, saline soil habitat, 18S rDNA phylogeny
DOI10.1186/s12862-020-01659-8
Language英语
WOS IDBMC:10.1186/s12862-020-01659-8
PublisherBioMed Central
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/36771
Collection淡水生态学研究中心_期刊论文
Corresponding AuthorShao,Chen
Affiliation1.Shaanxi Normal University; Laboratory of Protozoological Biodiversity and Evolution in Wetland, College of Life Sciences
2.University of Innsbruck; Research Department for Limnology, Mondsee
3.Ocean University of China; Institute of Evolution & Marine Biodiversity
4.King Saud University; Zoology Department
5.Chinese Academy of Sciences; Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology
Recommended Citation
GB/T 7714
Lu,Xiaoteng,Wang,Yuanyuan,Al-Farraj,Saleh A.,et al. The insights into the systematic relationship of Gastrostyla-affinitive genera, with report on a new saline soil ciliate genus and new species (Protozoa, Ciliophora)[J]. BMC Evolutionary Biology,2020,20(1):1-14.
APA Lu,Xiaoteng,Wang,Yuanyuan,Al-Farraj,Saleh A.,El-Serehy,Hamed,Huang,Jie,&Shao,Chen.(2020).The insights into the systematic relationship of Gastrostyla-affinitive genera, with report on a new saline soil ciliate genus and new species (Protozoa, Ciliophora).BMC Evolutionary Biology,20(1),1-14.
MLA Lu,Xiaoteng,et al."The insights into the systematic relationship of Gastrostyla-affinitive genera, with report on a new saline soil ciliate genus and new species (Protozoa, Ciliophora)".BMC Evolutionary Biology 20.1(2020):1-14.
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