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Xiang Peng,Wang Yu,Chen Ruixiang,Ye Youyin,Wang Chunguang,Chen Xiaoyin,Lin Mao. 2020. A new pelagic Polyconchoecia Xiang, Chen and Du, 2018 (Ostracoda: Myodocopa: Halocyprididae) from the South China Sea. Acta Oceanologica Sinica, 39(4):73-83
A new pelagic Polyconchoecia Xiang, Chen and Du, 2018 (Ostracoda: Myodocopa: Halocyprididae) from the South China Sea
南海多腺浮萤属(介形纲,状肢目,吸海萤科)一新种:陈氏多腺浮萤
Received:November 20, 2018  
DOI:10.1007/s13131-020-1584-2
Key words:taxonomy  Ostracoda  Halocyprididae  Conchoeciini  Polyconchoecia chenii sp. nov.  new species  South China Sea
中文关键词:  分类学  介形纲  吸海萤科  浮萤族  陈氏多腺浮萤  新种  南海
基金项目:The Global Climate Change and Ocean Atmosphere Interaction Research under contract No. GASI-01-02-04; the National Natural Science Foundation of China under contract Nos 41406216 and 41506217; the project sponsored by the Scientific Research Foundation of Third Institute of Oceanography, MNR under contract No. 2017009; the National Special Project on Gas Hydrate of China under contract No. DD20190218.
Author NameAffiliationE-mail
Xiang Peng Laboratory of Marine Biology and Ecology, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China xiangpeng@tio.org.cn 
Wang Yu Laboratory of Marine Biology and Ecology, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China  
Chen Ruixiang Laboratory of Marine Biology and Ecology, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China  
Ye Youyin Laboratory of Marine Biology and Ecology, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China  
Wang Chunguang Laboratory of Marine Biology and Ecology, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China  
Chen Xiaoyin Laboratory of Marine Biology and Ecology, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China  
Lin Mao Laboratory of Marine Biology and Ecology, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
Collaborative Innovation Center of Deep Sea Biology, Hangzhou 310012, China 
linmao@tio.org.cn 
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Abstract:
      Halocyprid ostracods are appreciable part of ostracods floating through virtually everywhere in marine environment. In this study, we describe a new species of genus Polyconchoecia Xiang, Chen and Du, 2018, tribe Conchoeciini Chavtur and Angel, 2011, family Halocyprididae Dana, 1853 from the middle of the South China Sea. Polyconchoecia chenii sp. nov. is very close to P. commixtus Xiang, Chen and Du, 2018. But it differs from P. commixtus by the distinctions of locations of major glands of carapace and the characteristics of appendages: more posteriorly situated left asymmetric gland of carapace, no right asymmetric gland; segmented frontal organ; the endopod 2 of the first antenna with a very small seta; a- and c-setae of the first antenna with long end joint have long end joint, the b- and d-setae have no end joint, spinose e-seta without end joint; the e-seta of the second antenna is present; teeth side is distinctive; the setal counts of the mandible, maxilla, fifth limb, and sixth limb are individual. The locations of the major glands on carapace and the characteristics of the first antenna can be the key of the new species. This work is the second discovery of the genus Polyconchoecia from the world.
中文摘要:
      吸海萤是一类分布广泛的海洋浮游动物,能生存在几乎所有的海洋环境中,也是介形动物的主要类别之一。本文描述了一个来自南海中部的吸海萤科、浮萤族、多腺浮萤属新种-陈氏多腺浮萤。陈氏多腺浮萤与复合多腺浮萤十分相似,但其在壳上主要腺体的位置和附肢的综合特征存在明显差异:1. 其左壳不对称腺位于更后方,右壳不具有对称腺;2. 其前器官具有分节;3. 第一触角内肢第二节具有一个细小的刚毛;4. 第一触角的a刚毛和c刚毛基部具有长柄,而b刚毛、d刚毛与e刚毛则不具长柄,e刚毛内侧具有小刺;5. 第二触角具有e刚毛;6. 二者齿面特征差异很大;7.二者大颚、小颚、第五肢、第六肢具有不同的刚毛数和分布特征。其中壳面主要腺体的位置和第一触角的特征是区分它们的主要特征。这是目前多腺浮萤属记录的第二个物种。
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