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Molecular phylogenetic position of the New Zealand sentinel crab, Macrophthalmus (Hemiplax) hirtipes (Jacquinot, in Hombron & Jacquinot, 1846) (Decapoda, Brachyura, Macrophthalmidae)

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The systematic position of the New Zealand sentinel crab Macrophthalmus (Hemiplax) hirtipes (Jacquinot, in Hombron & Jacquinot, 1846) has been questioned because the zoeal morphology is incongruent with that of other species assigned to the genus. A molecular phylogeny based on the mitochondrial large subunit (16S) rRNA gene indicates M. hirtipes is distinct from other macrophthalmid species, and found to be more closely related to the New Zealand varunids Austrohelice crassa, Hemigrapsus crenulatus, and Hemigrapsus sexdentatus. This indicates that the genus Macrophthalmus Desmarest, 1823 needs to be revised. La position systématique du crabe sentinelle Macrophthalmus (Hemiplax) hirtipes (Jacquinot, in Hombron & Jacquinot, 1846) a été mise en doute car la morphologie de la zoé n'est pas satisfaisante par rapport aux autres espèces de ce genre. Une phylogénie moléculaire basée sur L'ARNr de la grande sous-unité (16S) mitochondriale indique que M. hirtipes est distinct des autres espèces macrophtalmides, et est plus proche des varunidés de Nouvelle Zélande Austrohelice crassa, Hemigrapsus crenulatus et Hemigrapsus sexdentatus. Ceci indique que le genre Macrophthalmus Desmarest, 1823 doit être révisé.

Affiliations: 1: Department of Biological Science, Faculty of Science, Nara Women's University, Kitauoya-nishimachi, Nara 630-8506, Japan; 2: Osaka University of Arts Junior College, Higashisumiyoshi-ku, Osaka, 546-0023, Japan; 3: School of Biological Sciences, University of Canterbury, PB 4800, Christchurch, New Zealand


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