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Polyconchoecia commixtus gen. et sp. nov. (Ostracoda: Myodocopa: Halocyprididae) from the South China Sea

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Abstract

Planktonic ostracods are small crustaceans abundant in marine ecosystem worldwide as appreciable part of marine zooplankton. Family Halocyprididae is a large group of halocyprid ostracods, and the tribe Conchoeciini has contained 21 genera previously. We described a further genus with a species Polyconchoecia commixtus gen. et sp. nov. from the middle of South China Sea in this study. The new species can be distinguished from related genera and species in having a unique combination of these characteristics: a lateral gland placed over right asymmetric gland and open near posterior margin; dense edge glands placed along ventral margin of carapace in line; shape of frontal organ; e-seta of first antenna is bare; endopod of second antenna has one small oval hump with central concave on mid-ventral margin, instead of processus mamillaris, exopod 1 has a small disto-dorsal spine, exopod 1 and 2 are fused, exopod 3 and 4 are bare; endopod 1 of mandible has one long ventral seta, endopod 2 has one ventral seta; maxillary endopod 1 has two basal setae; endopod 1 of fifth limb has only one ventral seta; endopod 1 of sixth limb and endopod 2 have no ventral seta. The definite distinctions in locations of major glands are the key characteristics of the new genus.

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Acknowledgements

The authors thank Patrick Page-McCaw (Vanderbilt University, USA), Li Mingyu (Xiamen University, China), Niu Wentao and Chen Guangcheng for critical reading of the manuscript. The authors are thankful for the zooplankton research group in the Third Institute of Oceanography, SOA for their valuable suggestions for the manuscript preparation.

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  1. These authors contributed equally to this work.

Authors and Affiliations

  1. South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510300, China

    Feiyan Du & Lianggen Wang

  2. Guangdong Province Key Laboratory of Fishery Ecology and Environment, Guangzhou, 510300, China

    Feiyan Du & Lianggen Wang

  3. Laboratory of Marine Biology and Ecology, Third Institute of Oceanography, State Oceanic Administration, Xiamen, 361005, China

    Peng Xiang, Ruixiang Chen, Yu Wang, Chunguang Wang & Mao Lin

  4. Collaborative Innovation Center of Deep Sea Biology, Hangzhou, 310012, China

    Mao Lin

Authors
  1. Feiyan Du
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  2. Peng Xiang
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  3. Ruixiang Chen
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  4. Lianggen Wang
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  5. Yu Wang
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  6. Chunguang Wang
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  7. Mao Lin
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Corresponding authors

Correspondence to Peng Xiang or Mao Lin.

Additional information

Foundation item: The National Natural Science Foundation of China under contract Nos 41406188, 41406216 and 41506217; the Grant of China Ministry of Science and Technology under contract No. 2013BAD13B06; the Grant of Guangdong Province Ministry of Science and Technology under contract No. 2014A020217011; the Ministry of Agriculture Major Funding Projects under contract No. NFZX2013; the Global Climate Change and Ocean Atmosphere Interaction Research under contract No. GASI-01-02-04; the Project Sponsored by the Scientific Research Foundation of Third Institute of Oceanography, SOA under contract No. 2017009.

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Du, F., Xiang, P., Chen, R. et al. Polyconchoecia commixtus gen. et sp. nov. (Ostracoda: Myodocopa: Halocyprididae) from the South China Sea. Acta Oceanol. Sin. 37, 70–78 (2018). https://doi.org/10.1007/s13131-018-1302-5

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  • DOI: https://doi.org/10.1007/s13131-018-1302-5

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