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      Two new species of Plectranthias (Teleostei, Serranidae, Anthiadinae) from mesophotic coral ecosystems in the tropical Central Pacific

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          Abstract

          Two new species of Plectranthias perchlets are described, collected from mesophotic coral ecosystems in French Polynesia and the Republic of the Marshall Islands, in the tropical Central Pacific. Plectranthias polygonius sp. nov. was collected at a depth of 105 m in Tahiti, French Polynesia, and 120 m in Maloelap Atoll, Republic of the Marshall Islands. It was also observed in Moorea and Rangiroa (French Polynesia), and at Majuro and Erikub Atolls, Republic of the Marshall Islands. Plectranthias hinano sp. nov. was collected at a depth of 90–98 m in Tahiti, French Polynesia, and observed in Moorea. The barcode fragment of the cytochrome oxidase I gene of Plectranthias polygonius sp. nov. does not closely match any published sequence of Plectranthias , with approximately 15% uncorrected divergence from several species. Plectranthias polygonius sp. nov. can be distinguished from all of its congeners by coloration and morphology. The barcode fragment of the COI gene of Plectranthias hinano sp. nov. is closest to Plectranthias bennetti , with 5.4% uncorrected divergence. Plectranthias hinano sp. nov. is also distinguished from all of its congeners by morphology, and a coloration that includes two indistinct black spots along the base of the dorsal-fin, and transparent yellow dorsal and anal fin membranes. With this publication, the genus Plectranthias now comprises 58 valid species, with representatives from tropical to temperate waters of the Atlantic, Pacific, and Indian oceans. These two new discoveries add to the growing body of research highlighting the rich biodiversity of mesophotic ecosystems.

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          Most cited references 23

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          Assessing Undiscovered Fish Biodiversity on Deep Coral Reefs Using Advanced Self-Contained Diving Technology

           Richard Pyle (2000)
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            Mesophotic coral ecosystems are threatened and ecologically distinct from shallow water reefs

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              Upper and lower mesophotic coral reef fish communities evaluated by underwater visual censuses in two Caribbean locations

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                Author and article information

                Contributors
                Journal
                Zookeys
                Zookeys
                2
                urn:lsid:arphahub.com:pub:45048D35-BB1D-5CE8-9668-537E44BD4C7E
                urn:lsid:zoobank.org:pub:91BD42D4-90F1-4B45-9350-EEF175B1727A
                ZooKeys
                Pensoft Publishers
                1313-2989
                1313-2970
                2020
                16 June 2020
                : 941
                : 145-161
                Affiliations
                [1 ] Steinhart Aquarium, California Academy of Sciences, San Francisco, CA 94118, USA
                [2 ] Department of Ichthyology, California Academy of Sciences, San Francisco, CA 94118, USA
                [3 ] Department of Biology, San Francisco State University, San Francisco, CA 94132, USA
                Author notes
                Corresponding author: Bart Shepherd ( bshepherd@ 123456calacademy.org )

                Academic editor: D. Morgan

                Article
                50243
                10.3897/zookeys.941.50243
                7311480
                Bart Shepherd, Tyler A. Y. Phelps, Hudson T. Pinheiro, Claudia R. Rocha, Luiz A. Rocha

                This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                Funding
                donors to the California Academy of Sciences’ Hope for Reefs Initiative
                Categories
                Research Article
                Actinopterygii
                Animalia
                Chordata
                Osteichthyes
                Perciformes
                Pisces
                Serranidae
                Vertebrata
                Nomenclature
                Systematics
                Taxonomy
                Pacific

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