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      Resolution of the Portunus gladiator species complex: taxonomic status and identity of Monomia gladiator (Fabricius, 1798) and Monomia haanii (Stimpson, 1858) ( Brachyura , Decapoda , Portunidae )

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          Abstract

          Abstract

          The United States Food and Drug Administration (FDA) has recently adopted DNA barcoding for the purpose of determining the species identity of commercial seafood products. This effort has revealed instances of incongruence between current scientifically accepted taxon names and those utilized by the seafood industry in product labelling. One such case is that of “ Portunus haanii ”, a name utilized by the seafood industry to label commercial products under the market name “red swimming crab.” However, carcinologists currently regard P. haanii as synonym of Portunus gladiator Fabricius, 1798, which itself is the subject of debate over whether it is a secondary homonym of Cancer gladiator Fabricius, 1793. Further complicating matters, DNA barcode sequences from commercial products match GenBank sequences identified as Portunus pseudoargentatus Stephenson, 1961. Here the complicated taxonomic history of the Portunus gladiator complex is reviewed and a resolution proposed based on combined morphological descriptions and molecular phylogenetic analyses. It is demonstrated that, given the provisions of the International Code of Zoological Nomenclature and the current elevation of Monomia Gistel, 1848, to full genus rank, its type species, Portunus gladiator Fabricius, 1798, should be treated as a valid and available taxon name. It is also shown, upon examination and comparison of types and topotypic material that Monomia haanii (Stimpson, 1858) is a distinct taxon from M. gladiator , and Portunus pseudoargentatus Stephenson, 1961, is a junior subjective synonym of M. haanii (Stimpson, 1858). Furthermore, it is shown that crab meat sold in the US currently labeled as “ Portunus haanii ” and/or “red swimming crab” is in fact M. haanii using comparative analysis of DNA barcode sequences between museum-vouchered reference specimens, whole crabs provided directly by a seafood importer, and processed commercial products purchased at retail.

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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
                2019
                01 July 2019
                : 858
                : 11-43
                Affiliations
                [1 ] United States Food and Drug Administration, Office of Regulatory Science, 5001 Campus Dr. College Park, MD 20740 United States Food and Drug Administration College Park United States of America
                [2 ] Lee Kong Chian Natural History Museum, Faculty of Science, National University of Singapore, 2 Conservatory Drive, 117377 Singapore National University of Singapore Singapore Singapore
                Author notes
                Corresponding author: Amanda M. Windsor ( amanda.windsor@ 123456fda.gov )

                Academic editor: Sammy De Grave

                Article
                PMC6614167 PMC6614167 6614167 33826 urn:lsid:arphahub.com:pub:e1cc00e3-4839-57b6-9e81-2a07b4a13b37 urn:lsid:zoobank.org:pub:32E15439-8D09-49E2-8DCC-94C0C3AC6F7F
                10.3897/zookeys.858.33826
                6614167
                31312088

                This is an open access article distributed under the terms of the CC0 Public Domain Dedication.

                Categories
                Research Article
                Animalia
                Decapoda
                Portunidae
                Molecular Systematics
                Nomenclature
                Phylogeny
                Systematics
                Taxonomy
                Asia
                Australia
                China Seas
                Indian Ocean
                Japan
                Pacific Ocean
                Singapore
                Taiwan
                Thailand
                Vietnam
                Western Australia

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