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A new hypotrich ciliate, Oxytricha xianica sp. nov., with notes on the morphology and phylogeny of a Chinese population of Oxytricha auripunctata Blatterer & Foissner, 1988 (Ciliophora, Oxytrichidae)

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Abstract

The morphology and infraciliature of the new hypotrichous ciliate, Oxytricha xianica sp. nov., and a Chinese population of Oxytricha auripunctata Blatterer & Foissner, 1988, are investigated using live observation and protargol staining. Oxytricha xianica sp. nov. is defined by the body size 85–130 µm × 30–50 µm in vivo, the typical oxytrichid 18 frontoventral–transverse cirri, cortical granules absent, undulating membranes reduced or absent, three caudal cirri, dorsal kineties in Oxytricha pattern, and two ellipsoidal macronuclear nodules. The Chinese population of O. auripunctata differs slightly from other populations in the arrangement and color of cortical granules and position of anterior end of dorsal kinety 4. Phylogenetic analyses based on SSU-rDNA sequences support the assertion that O. auripunctata belongs to Oxytricha and Oxytrichidae.

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Acknowledgements

This study was supported by the Natural Science Foundation of China (project numbers: 32070428, 31872206).

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Author notes

  1. Jingyi Wang, Tengteng Zhang have contributed equally to this work.

Authors and Affiliations

  1. Laboratory of Protozoological Biodiversity and Evolution in Wetland, College of Life Sciences, Shaanxi Normal University, Xi’an, 710119, China

    Jingyi Wang & Chen Shao

  2. Insititute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao, 266003, China

    Tengteng Zhang

  3. College of Life Science, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, China

    Fengchao Li

  4. Department of Life Sciences, Natural History Museum, London, SW7 5BD, UK

    Alan Warren

  5. Handan Foreign Language School of Hebei Province, Handan, 056002, China

    Yanbo Li

Authors
  1. Jingyi Wang
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  2. Tengteng Zhang
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  3. Fengchao Li
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  4. Alan Warren
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  5. Yanbo Li
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  6. Chen Shao
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Contributions

JW and TZ collected the samples and performed the experiments. FL and YL assisted with the calculations, sequencing and phylogenetic analyses. AW revised and edited the manuscript. CS carried out the species identifications and helped to revise the manuscript.

Corresponding author

Correspondence to Chen Shao.

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The authors declare that they have no conflict of interest.

Animal and human rights statement

We declare that all applicable international, national, and/or institutional guidelines for sampling, care, and experimental use of organisms for the study have been followed and all necessary approvals have been obtained.

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Edited by Jiamei Li.

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Wang, J., Zhang, T., Li, F. et al. A new hypotrich ciliate, Oxytricha xianica sp. nov., with notes on the morphology and phylogeny of a Chinese population of Oxytricha auripunctata Blatterer & Foissner, 1988 (Ciliophora, Oxytrichidae). Mar Life Sci Technol 3, 303–312 (2021). https://doi.org/10.1007/s42995-020-00089-1

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