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Description of Pseudeuchaeta vulgaris n. sp. (Copepoda: Calanoida), a new aetideid species from the deep Pacific Ocean with notes on the biogeography of benthopelagic aetideid calanoids

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Abstract

A new aetideid species Pseudeuchaeta vulgaris sp. nov. is described from females collected at abyssal depths above the seabed from the Clarion Clipperton Fracture Zone in the equatorial northeastern Pacific. It belongs to the benthopelagic group of Pseudeuchaeta Sars, 1905 species. The new species is distinguished from all congeners by two setae present on the maxillule proximal basal endite. It is closely related to P. magna Bradford, 1969 and P. major (Wolfenden, 1911), as all three species share a mandible endopod segment 2 with 4–5 setae and the P1 exopod segment 1 lacking a lateral spine. The new species is the fourth benthopelagic representative of the genus found in the abyssal near-bottom environment of the Pacific Ocean and the first benthopelagic Pseudeuchaeta species recorded in the tropical Pacific. An illustrated overview on the distribution of the genus Pseudeuchaeta is given together with notes on the biogeography of benthopelagic aetideid calanoids in the world’s ocean. While some genera show a nearly worldwide distribution, only few species have been reported in more than one ocean so far. This reflects the undersampling of the benthopelagial in the deep ocean.

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Acknowledgments

The ABYSSLINE (ABYSSal baseLINE) environmental survey of the UK-1 exploration claim is supported by a collaborative partnership between seven non-profit global academic research institutes (University of Hawaii, USA; Hawaii Pacific University, USA; Natural History Museum, UK; Uni Research, Norway; National Oceanography Centre, UK; Senckenberg Institute, Germany; IRIS, Norway) and through a commercial arrangement with UK Seabed Resources Ltd. The authors thank the UKSRL and Prof. Pedro Martínez Arbizu for providing the calanoid specimens from the ABYSSLINE expedition and the German Federal Institute for Geosciences and Natural Resources (BGR) and Annika Janssen for the specimen from Mangan 2013. We thank the reviewers for their careful reading of our manuscript and their valuable comments. The research of E.L. Markhaseva at the German Center for Marine Biodiversity Research (DZMB) was funded by the ABYSSLINE project.

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Authors and Affiliations

  1. Zoological Institute, Russian Academy of Sciences, Universitetskaya nab. 1, St. Petersburg, 199034, Russia

    Elena L. Markhaseva

  2. Senckenberg Research Institute, German Center for Marine Biodiversity Research (DZMB), Südstrand 44, 26382, Wilhelmshaven, Germany

    Inga Mohrbeck

  3. Senckenberg Research Institute, German Center for Marine Biodiversity Research (DZMB), Martin-Luther-King Platz 3, D-20146, Hamburg, Germany

    Jasmin Renz

Authors
  1. Elena L. Markhaseva
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  2. Inga Mohrbeck
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  3. Jasmin Renz
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Correspondence to Elena L. Markhaseva.

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Communicated by S. S. M. Kaiser

This article is registered in ZooBank under urn:lsid:zoobank.org:pub:FC4EC633-43B2-4499-9951-D4BDE4D4DB04

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Markhaseva, E.L., Mohrbeck, I. & Renz, J. Description of Pseudeuchaeta vulgaris n. sp. (Copepoda: Calanoida), a new aetideid species from the deep Pacific Ocean with notes on the biogeography of benthopelagic aetideid calanoids. Mar Biodiv 47, 289–297 (2017). https://doi.org/10.1007/s12526-016-0527-9

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