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Type: Article
Published: 2022-01-17
Page range: 587-597
Abstract views: 694
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A distinctive new species of the genus Polyonyx Stimpson, 1858 (Crustacea: Decapoda: Anomura: Porcellanidae) from Okinawa, southwestern Japan

Estuary Research Center, Shimane University, 1060 Nishikawatsu-cho, Matsue, Shimane 690-8504, Japan.
Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara, Nakagami, Okinawa 903–0213, Japan.
Crustacea coral reef new species Polyonyx sinensis group porcelain crab symbiosis western Pacific

Abstract

The new porcellanid crab Polyonyx deezi n. sp. is described on the basis of two specimens from Okinawa Island, Ryukyu Islands, southwestern Japan. The new species belongs to the P. sinensis group and may be closest to P. socialis Werding & Hiller, 2019 in the comparatively broad proportions of the carpi of the chelipeds and meri of the ambulatory legs. However, P. deezi n. sp. is immediately distinguished from all other congeners by the median branchial margins of the carapace being bluntly angular and produced laterally and the dorsal surfaces of the carapace and chelipeds with distinct protuberances. The occurrence of P. deezi n. sp. from coral reefs may be unusual in species of the P. sinensis group because many of the known species have been recorded from estuaries or coastal embayments. An identification key to the Indo-West Pacific species of the Polyonyx sinensis group is provided.

 

References

  1. Britayev, T.A., Mekhova, E., Deart, Y. & Martin, D. (2017) Do syntopic host species harbour similar symbiotic communities? The case of Chaetopterus spp. (Annelida: Chaetopteridae). PeerJ, 5, e2930. https://doi.org/10.7717/peerj.2930
    Cuvier, G. (1830) Le Règne Animal Distribué d'après son Organisation, pour Servir de Base à l'Histoire Naturelle des Animaux et d'Introduction à l'Anatomie Comparée. Tome 3. 2nd Édition. Déterville et Crochard, Paris, 504 pp.
    Haig, J. (1965) The Porcellanidae (Crustacea, Anomura) of Western Australia with description of four new Australian species. Journal of the Royal Society of Western Australia, 48, 97–117.
    Haswell, W.A. (1882) Description of some new species of Australian Decapoda. Proceedings of the Linnean Society of New South Wales, 6, 750–763. https://doi.org/10.5962/bhl.part.11897
    Haworth, A.H. (1825) A new binary arrangement of the macrurous Crustacea. The Philosophical Magazine and Journal, 65, 105–106, 183–184 https://doi.org/10.1080/14786442508628400
    Johnson, D.S. (1958) The Indo-West Pacific species of the genus Polyonyx (Crustacea, Decapoda, Porcellanidae). The Annals of Zoology, 2, 95–118.
    Marenzeller, E. von (1879) Südjapanische Anneliden. I. (Amphinomea, Aphroditea, Lycoridea, Phyllodocea, Hesionea, Syllidea, Eunicea, Glycerea, Sternaspidea, Chaetopterea, Cirratulea, Amphictenea). Denkschriften der Kaiserlichen Akademie der Wissenschaften, Mathematisch-naturwissenschaftliche Classe, Wien, 41, 109–154, pls. I–VI.
    McNeill, F.A. (1968) Crustacea, Decapoda & Stomatopoda. Great Barrier Reef Expedition 1928–29, Scientific Reports, 7, 1– 98, pls. 1–2. [British Museum (Natural History), London]
    Miyake, S. (1943) Studies on the crab-shaped Anomura of Nippon and adjacent waters. Journal of the Department of Agriculture, Kyushu Imperial University, 7, 49–158.
    Naruse, T., Watanabe, T. & Yoshida, R. (2017) Additional information on the distribution and habitats of six hexapodid species (Crustacea: Decapoda: Brachyura), with review of their Japanese names. Fauna Ryukyuana, 35, 17–28. [in Japanese with English abstract]
    Ng, P.K.L. & Sasekumar, A. (1993) A new species of Polyonyx Stimpson, 1858, of the P. sinensis group (Crustacea: Anomura: Porcellanidae) commensal with a chaetopterid worm from Peninsular Malaysia. Zoologische Mededelingen, 67, 466–472.
    Nishi, E. (2001) Partial revision of Japanese Chaetopterus (Chaetopteridae, Polychaeta), including description of three new species from southern Pacific side of central Japan. Actinia, 14, 1–26.
    Nobili, G. (1906) Diagnoses préliminaires de 34 espèces et variétés nouvelles, et de 2 genres nouveaux de décapodes de la Mer Rouge. Bulletin du Muséum National d’Histoire, Paris, 11 (1905), 393–411, figs. 1, 2.
    Osawa, M. (2007) Porcellanidae (Crustacea: Decapoda: Anomura) from New Caledonia and the Loyalty Islands. Zootaxa, 1548 (1), 1–49. https://doi.org/10.11646/zootaxa.1548.1.1
    Osawa, M. (2015) A new species of Polyonyx Stimpson, 1858 (Crustacea: Decapoda: Anomura: Porcellanidae) from the PANGLAO 2004 Marine Biodiversity Project in the Philippines. Raffles Bulletin of Zoology, 63, 536–545.
    Osawa, M. (2018) A new species of the Polyonyx sinensis group (Crustacea: Decapoda: Anomura: Porcellanidae) from the Central Philippines. Zootaxa, 4486 (3), 393–400. https://doi.org/10.11646/zootaxa.4486.3.10
    Osawa, M. & Chan, T.-Y. (2010) Part III. Porcellanidae (Porcelain crabs). In: Chan, T.-Y. (Ed.), Crustacean Fauna of Taiwan: Crab-like Anomurans (Hippoidea, Lithodoidea and Porcellanidae). National Taiwan Ocean University, Keelung, pp. 67–181.
    Osawa, M. & McLaughlin, P.A. (2010) Annotated checklist of anomuran decapod crustaceans of the world (exclusive of the Kiwaoidea and families Chirostylidae and Galatheidae of the Galatheoidea) Part II—Porcellanidae. In: Low, M.E.Y. & Tan, S.H. (Eds.), Checklists of Anomuran Decapod Crustaceans of the World (exclusive of the Kiwaioidea and families Chirostylidae and Galatheidae of the Galatheoidea) and Marine Lobsters of the World. Raffles Bulletin of Zoology, Supplement, 23, pp. 109–129.
    Osawa, M., Naruse, T. & Ng, P.K.L. (2018) New records of species of the Polyonyx sinensis group (Crustacea: Decapoda: Anomura: Porcellanidae) from Japan, the Philippines, Singapore, and Malaysia, with descriptions of two new species. Zootaxa, 4429 (2), 303–323. https://doi.org/10.11646/zootaxa.4429.2.6
    Osawa, M. & Ng, P.K.L. (2016) Revision of Polyonyx pedalis Nobili, 1906 (Crustacea: Decapoda: Anomura: Porcellanidae), with descriptions of three new species. Raffles Bulletin of Zoology, Supplement, 34, 499–518.
    Rahayu, D.L. & Ng, P.K.L. (2014) New genera and new species of Hexapodidae (Crustacea, Brachyura) from the Indo-West Pacific and east Atlantic. Raffles Bulletin of Zoology, 62, 396–483.
    Sankolli, K.N. (1965) On a new species of commensal porcellanid crab, Polyonyx loimicola sp. nov., from India (Crustacea, Anomura, Porcellanidae). Journal of the Bombay Natural History Society, 62, 285–291.
    Stimpson, W. (1858) Prodromus descriptionis animalium evertebratorum, quae in Expeditione ad Oceanum Pacificum Septentrionalem, a Republica Federata missa, Cadwaladaro Ringgold et Johanne Rodgers Ducibus, observavit et descripsit. Pars VII. Crustacea Anomura. Proceedings of the Academy of Natural Sciences of Philadelphia, 1858, 225–252. [preprint (December 1858)] https://doi.org/10.5962/bhl.title.51447
    Walker, A.O. (1887) Notes on a collection of Crustacea from Singapore. Journal of the Linnean Society of London, Zoology, 20, 107–117. https://doi.org/10.1111/j.1096-3642.1887.tb01440.x
    Werding, B. (2001) Description of two new species of Polyonyx Stimpson, 1858 from the Indo-West Pacific, with a key to the species of the Polyonyx sinensis group (Crustacea: Decapoda: Porcellanidae). Proceedings of the Biological Society of Washington, 114, 109–119.
    Werding, B. & Hiller, A. (2019) A new species of Polyonyx (Crustacea, Anomura, Porcellanidae) inhabiting polychaete-worm tubes (Annelida, Chaetopteridae) in the Indo-West Pacific. ZooKeys, 818, 25–34. https://doi.org/10.3897/zookeys.818.30587

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