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Type: Article
Published: 2024-04-02
Page range: 379-397
Abstract views: 14
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Glypturus ferox, a new species of ghost shrimp (Decapoda: Axiidea: Callichiridae) from the Ryukyu Islands, southwestern Japan

Graduate School of Engineering and Science; University of the Ryukyus; 1 Senbaru; Nishihara; Nakagami; Okinawa; 903–0213 Japan
Natural History Museum and Institute; Chiba; 955-2 Aoba-cho; Chuo-ku; Chiba; 260-8682 Japan
Ishigaki; Okinawa; Japan
Crustacea 16S rRNA gene identification key inner reef intertidal sand flats phylogenetic analysis seagrass beds


The callichirid ghost shrimp genus Glypturus Stimpson, 1866 was represented until now by four extant species world-wide. Only G. armatus A. Milne-Edwards, 1870 is known from the western Pacific. In this study, we describe G. ferox n. sp. based on seven specimens collected from the Ryukyu Islands, southwestern Japan. All specimens of the new species were collected in inner reef lagoons by suction pump. The new species is easily distinguished from all other congeners, including fossil taxa, by having a row of spines on the lower margin of the major cheliped palm. Molecular phylogenetic analysis using the mitochondrial 16S rRNA gene suggests that G. ferox n. sp. is sister to G. armatus; the genetic divergence between the two species is high. An identification key to extant species of Glypturus is provided. A brief overview on Japanese species of Callichiridae is also provided. Glypturus ferox n. sp. is the nineth species of the family known from Japanese waters with certainty.


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