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Two new marine benthic diatom species of Hippodonta (Bacillariophyceae) from the coast of China: H. nanjiensis sp. nov. and H. qingdaoensis sp. nov.

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Abstract

The diversity and distribution of Hippodonta species on the coast of China are largely unknown due to limited investigations. In this paper, we report the detailed morphology and ultrastructure of two new species: H. nanjiensis sp. nov., collected from intertidal sandy sediments of Nanji Islands, the East China Sea and H. qingdaoensis sp. nov., collected from intertidal sandy sediments of the No. 1 Bathing Beach in Qingdao City, the Yellow Sea. Both species occur mainly in the middle part of the intertidal zone. H. nanjiensis possesses a unique large round central area. H. qingdaoensis differs from congeners in having a unique stria pattern, wherein the areolae in the middle transapical striae are less developed or absent on the primary side of the valve, and two areolae per stria are apparent under light microscopy (LM). This study expands our knowledge of Hippodonta diversity and distribution on the coast of China.

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Data Availability Statement

The authors declare that the data supporting the findings of this study are available within the article. The data will be available on request from the corresponding author.

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Acknowledgment

The authors are grateful to three anonymous reviewers for providing constructive suggestions, and to Mrs. CAI Houcai, CHEN Wandong, and the staff of the Nanji Islands National Marine Natural Reserve Research Institute for their help in sample collection.

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Authors and Affiliations

  1. Laboratory of Marine Organism Taxonomy and Phytogeny, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China

    Yuhang Li, Zhongmin Sun, Tamotsu Nagumo & Kuidong Xu

  2. Echigo Natural History Laboratory, Kowada 719, Ojiya, Niigata, 947-0041, Japan

    Tamotsu Nagumo

  3. Laboratory for Marine Biology and Biotechnology Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237, China

    Kuidong Xu

  4. University of Chinese Academy of Sciences, Beijing, 100049, China

    Kuidong Xu

  5. Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, 266071, China

    Kuidong Xu

Authors
  1. Yuhang Li
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  2. Zhongmin Sun
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  3. Tamotsu Nagumo
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  4. Kuidong Xu
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Corresponding author

Correspondence to Kuidong Xu.

Additional information

Supported by the National Natural Science Foundation of China (No. 31800171), the CAS President’s International Fellowship for Visiting Scientists (No. 2018VBA0035), and the Nanji Islands Marine Natural Reserve Project (No. NJKJ-2013-005)

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Li, Y., Sun, Z., Nagumo, T. et al. Two new marine benthic diatom species of Hippodonta (Bacillariophyceae) from the coast of China: H. nanjiensis sp. nov. and H. qingdaoensis sp. nov.. J. Ocean. Limnol. 39, 1033–1041 (2021). https://doi.org/10.1007/s00343-020-0104-8

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  • DOI: https://doi.org/10.1007/s00343-020-0104-8

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