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A new genus and species of shrimp (Crustacea: Axiidea: Axiidae) from the Caroline Ridge, northwest Pacific

  • Seamount Megabenthos Taxonomy and Phylogeny
  • Published:
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Abstract

A new genus and species of axiid shrimp, Carolinaxius kexuae gen. et sp. nov. is described and illustrated based on a single specimen collected from an unnamed seamount in the Caroline Ridge, northwest Pacific. Although both chelipeds are missing, the specimen can be distinguished from other axiid genera by a combination of characteristics: narrowly triangular rostrum; median carina and lateral gastric carina each with one prominent tooth; submedian gastric carinae converging posteriorly, with teeth; cornea weakly pigmented, eyestalk with acute distomesial tooth on dorsal surface; male pleopod 1 two-articled; pleopod 2 with appendix interna and appendix masculina; pleopods 3–5 with appendix interna. The molecular phylogeny suggests the new genus is most closely related to another recently described genus living inside hexactinellid sponges on seamounts in the Indian Ocean, Montanaxius Dworschak, 2016. However, it differs from Montanaxius in the shape of the rostrum, the arrangement of teeth on the carapace, and the shape of the eyestalk. Besides, the significant molecular differences support the two belonging to different genera.

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Data Availability Statement

The datasets generated for this study can be found in the GenBank (http://www.ncbi.nlm.nih.gov/genbank). ZooBank registration publication LSID: urn:lsid:zoobank.org:pub:04689387-F68B-47C5-BE73-C1C4F54246FB.

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Acknowledgment

We sincerely thank Dr. Kuidong XU (Institute of Oceanology, Chinese Academy of Sciences, Qingdao) for providing us with the deep-sea specimen collected during the M8 seamount cruise and Dr. Xuwen WU (Institute of Oceanology, Chinese Academy of Sciences, Qingdao) for offering us color photo and collection information of the new species. We want to express our appreciation to the crews of the R/V Kexue for their great support in sampling with ROV Faxian during the expedition in the Caroline Ridge, northwest Pacific in June 2019. We are also grateful to Laure Corbari, Paula Lefèvre-Martin and Anouchka Krygelmans for help in making collections and tissue samples available at Muséum National d’Histoire naturelle, Paris.

Author information

Authors and Affiliations

  1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China

    Qi Kou & Xinzheng Li

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

    Qi Kou & Xinzheng Li

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

    Qi Kou & Xinzheng Li

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

    Qi Kou & Xinzheng Li

  5. Museums Victoria, PO Box 666, Melbourne, Vic., 3001, Australia

    Gary C. B. Poore

Authors
  1. Qi Kou
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  2. Gary C. B. Poore
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  3. Xinzheng Li
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Correspondence to Xinzheng Li.

Additional information

Supported by the Science & Technology Basic Resources Investigation Program of China (No. 2017FY100804), the Natural Science Foundation of China (Nos. 41930533, 41876178), the National Key R&D Program of China (No. 2018YFC0309804), and the China Ocean Mineral Resources Research and Development Association Program (Nos. DY135-E2-1-02, DY135-E2-3-04)

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Kou, Q., Poore, G.C.B. & Li, X. A new genus and species of shrimp (Crustacea: Axiidea: Axiidae) from the Caroline Ridge, northwest Pacific. J. Ocean. Limnol. 39, 1830–1840 (2021). https://doi.org/10.1007/s00343-021-0446-x

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  • DOI: https://doi.org/10.1007/s00343-021-0446-x

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