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Issue: Vol. 5476 No. 1: 4 Jul. 2024
Type: Article
Published: 2024-07-04
DOI: 10.11646/zootaxa.5476.1.31
Page range: 424-433
Abstract views: 13
PDF downloaded: 0

Actumnus ngankeeae sp. nov. and Pilumnus swajayai Ng & Rahayu, 2021, pilumnid crabs from Japan (Crustacea: Decapoda: Brachyura)

Department of Zoology; National Museum of Nature and Science; Tokyo; 4-1-1 Amakubo; Tsukuba; Ibaraki 305-0005; Japan
Department of Zoology; National Museum of Nature and Science; Tokyo; 4-1-1 Amakubo; Tsukuba; Ibaraki 305-0005; Japan
Crustacea Brachyuran crabs Actumnus Pilumnus Pilumnidae taxonomy new species Ogasawara Islands Ryukyu Islands West Pacific

Abstract

New and rare crab species of the family Pilumnidae, Actumnus ngankeeae sp. nov. and Pilumnus swajayai Ng & Rahayu, 2021, are reported from Japan. Actumnus ngankeeae from the Ogasawara (Bonin) Islands is characterized by the following features: the carapace is transversely ovate and strongly convex longitudinally and transversely; the dorsal surface is uniformly covered with small granules and sparse short setae, with the regions defined by narrow furrows; the anterolateral margin is narrowly crested along its whole length and separated into four convex lobes by three V-shaped notches. Both chelipeds are stout, with short, strongly curved fingers. Its specific affinity to A. obesus Dana, 1852, is briefly discussed. Pilumnus swajayai from the Ryukyu Islands is wholly covered with tomentum; the carapace anterolateral margin is armed with three sharp teeth directed obliquely forwards, the second of which is the largest; the subhepatic tooth is distinct, but smaller than the carapace anterolateral teeth; the hepatic region is armed with a dentiform lobe; both chelipeds are armed with scattered conical granules on the carpi and palms; and the ambulatory legs are armed with some spinules on the dorsal margins of the carpi and propodi. The generic affiliation to Pilumnus is acceded to the original description after discussion on the related genera. The present record of P. swajayai from the Ryukyu Islands is the second since the original description from Indonesian waters.

 

References

  1. Asada, Y. & Sato, T. (2020) New record of pilumnid crab Nanopilumnus rouxi (Balss, 1935) (Decapoda) from Okayama Prefecture, western Japan. Cancer, 29, e113⎼e117. [in Japanese with English title]
  2. Balss, H. (1933) Beiträge zur Kenntnis der Gattung Pilumnus (Crustacea Dekapoda) und verwandter Gattungen. Capita Zoologica, 4 (3), 1⎼47, pls. 1–7.
  3. Balss, H. (1935) On three Indian crabs (Decapoda, Brachyura) of the Madras Museum. Records of the Indian Museum, 37, 45⎼48. https://doi.org/10.26515/rzsi/v37/i1/1935/163005
  4. Bell, T. (1835) Observations on the genus Cancer of Dr. Leach (Platycarcinus, Latr.,), with descriptions of three new species. Transactions of the Zoological Society of London, 1, 335–342, pls. 43–47. https://doi.org/10.1111/j.1096-3642.1835.tb00634.x
  5. Bouvier, E.-L. (1915) Décapodes marcheurs (Reptantia) et stomatopodes recueillis à l’île Maurice par M. Paul Carié. Bulletin Scientifique de la France et de la Belgique, 48, 178–318, pls. 4–7.
  6. Dana, J.D. (1851) On the classification of the Cancroidea. American Journal of Science and Arts, Series 2, 12, 121–131.
  7. Dana, J.D. (1852, 1855) Crustacea. United States Exploring Expedition during the years 1838, 1839, 1840, 1841, 1842 under the command of Charles Wilkes, U.S.N., 13 (1), i–viii, 1–685. [Atlas, Crustacea (1855). C. Sherman, Philadelphia, 27 pp., 96 pls.]
  8. Davie, P.J.F. (1989) Two new genera of the family Pilumnidae (Crustacea: Decapoda: Brachyura) from Queensland, Australia. Journal of Natural History, 23, 1353⎼1365. https://doi.org/10.1080/00222938900770721
  9. Deb, M. (1992) Two new species of xanthid crabs from Bay Islands. Journal of the Andaman Science Association, 8, 121–124.
  10. Edmondson, C.H. (1962) Xanthidae of Hawaii. Occasional Papers of Bernice P. Bishop Museum, 22, 215⎼309.
  11. Ghory, F., Ng, P.K.L. & Kazmi, Q.B. (2013) On the identities of Pilumnopeus convexus MacCagno, 1936, and P. salomonensis Ward, 1942, from the Indian Ocean, with a note on P. riuii Takeda, 2001 (Decapoda, Brachyura, Pilumnidae). Crustaceana, 86, 301⎼312. https://doi.org/10.1163/15685403-00003180
  12. Gordon, I. (1934) Crustacea Brachyura. Résultats Scientifiques du Voyage aux Indes Orientales Néerlandaises de LL. AA. RR. le Prince et la Princesse Léopold de Belgique. Mémoires du Musée Royal d’Histoire Naturelle de Belgique, Hors Série, 3 (15), 1–78.
  13. Henderson, J.R. (1893) A contribution to Indian Carcinology. Transactions of the Linnean Society of London, Series 2, 5, 325⎼458, pls. 36⎼40. https://doi.org/10.1111/j.1096-3642.1893.tb00653.x
  14. Herbst, J.F.W. (1801) Versuch einer Naturgeschichte der Krabben und Krebse nebst einer systematischen Beschreibung ihrer verschiedenen Arten, 3 (3), 1–54, pls. 55–58. Gottlieb August Lange, Berlin und Stralsund.
  15. MacLeay, W.S. (1838) Illustrations of the Annulosa of South Africa; being a Portion of the Objects of Natural History chiefly collected during an Expedition into the Interior of South Africa, under the Direction of Dr. Andrew Smith, in the Years 1834, 1835, and 1836; fitted out by “The Cape of Good Hope Association for Exploring Central Africa.” On the brachyurous decapod Crustacea. Brought from the Cape by Dr. Smith. In: Smith, A. (Ed.), Illustrations of the Zoology of South Africa; consisting chiefly of Figures and Descriptions of the Objects of Natural History collected during an Expedition into the Interior of South Africa, in the Years 1834, 1835, and 1836; fitted out by “The Cape of Good Hope Association for Exploring Central Africa:” together with a Summary of African Zoology, and an Inquiry into the Geographical Ranges of Species in that Quarter of the Globe. Published under the Authority of the Lords Commissioners of Her Majesty’s Treasury. Smith, Elder & Co., London, pp. 53–71, pls. 2 + 3.
  16. Maenosono, T. (2022) On species of Nanopilumnus Takeda, 1974 (Pilumnidae) collected from southern Japan, with new distributional records. Niche Life, 9, 26–28. [in Japanese with English abstract]
  17. Man, J.G. De (1902) Die von Herrn Professor Kükenthal im Indischen Archipel gesammelten Dekapoden und Stomatopoden. In: Kükenthal, W. (Ed.), Ergebnisse einer zoologischen Forschungsreise in den Molukken und Borneo. Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft, 25, pp. 467⎼929. https://doi.org/10.5962/bhl.title.10409
  18. Milne-Edwards, A. (1873) Recherches sur la faune carcinologique de la Nouvelle-Calédonie. Deuxième partie. Nouvelles Archives du Muséum d’Histoire naturelle, Paris, 9, 155⎼332, pls. 4⎼18. https://doi.org/10.5962/bhl.title.10410
  19. Monod, Th. (1956) Hippidea et Brachyura oust-africains. Mémoires de l’Institut Français d’Afrique Noire, 45, 1⎼674.
  20. Ng, P.K.L., Guinot, D. & Davie, P.J.F. (2008) Systema Brachyurorum: Part I. An annotated checklist of extant brachyuran crabs of the world. Raffles Bulletin of Zoology, 17, 1⎼286.
  21. Ng, P.K.L. & Rahayu, D.L. (2021) On the Pilumnidae (Crustacea: Brachyura: Pilumnidae) collected during the SJADES 2018 biodiversity cruise in Indonesia, with description of a new species of Pilumnus. Raffles Bulletin of Zoology, Supplement 36, 265–276.
  22. Rathbun, M.J. (1906) The Brachyura and Macrura of the Hawaiian Islands. Bulletin of the United States Fish Commission, 23, 827⎼930, pls. 1⎼24.
  23. Rathbun, M.J. (1907) The Brachyura. IX. Reports on the scientific results. of the expedition to the tropical Pacific, in charge of Alexander Agassiz, by the U.S. Fish Commission steamer “Albatross,” from August, 1899, to March, 1900, Commander Jefferson F. Moser, U.S.N., commanding. X. Reports on the scientific results of the expedition to the eastern tropical Pacific, in charge of Alexander Agassiz, by the U.S. Fish Commission steamer “Albatross,” from October, 1904, to March, 1905, Lieut.-Commander L. M. Garrett, U.S.N., commanding. Memoirs of the Museum of Comparative Zoölogy at Harvard College, 35, 23–74, pls. 1–9.
  24. Sakai, K. (1999) J. F. W. Herbst-Collection of decapod Crustacea of the Berlin Zoological Museum, with remarks on certain species. Naturalists, 6, 1⎼45, pls. 1⎼21.
  25. Sakai, T. (1934) Brachyura from the coast of Kyushu, Japan. Science Reports of Tokyo Bunrika Diagaku, Series B, 1, 281⎼330, pls. 17, 18.
  26. Serène, R. (1971) Observations préliminaires sur des brachyoures nouveaux ou mal connus du sudest asiatique (Crustacea Decapoda). Bulletin du Muséum national d’Histoire naturelle, Paris, Series 2, 42, 903⎼918, pls. 1⎼6.
  27. Serène, R. & Umali, A.F. (1972) The family Raninidae and other new and rare species of brachyuran decapods from the Philippines and adjacent regions. Philippine Journal of Science, 99, 21⎼105, pls. 1⎼9. [dated 1970, published 1972]
  28. Števčić, Z. (2011) Addition to the reclassification of the brachyuran crabs (Crustacea: Decapoda: Brachyura). Part I. New taxa. Natura Croatica, 20, 125–139.
  29. Takeda, M. (1974) Pilumnid crabs of the family Xanthidae from the West Pacific. V. Definition of a new genus, with description of its type-species. Bulletin of the National Science Museum, Tokyo, 17, 215⎼219.
  30. Takeda, M. & Komatsu, H. (2018) Offshore crabs of the family Xanthidae and some related families (Crustacea, Decapoda, Brachyura) from the Ogasawara Islands, Japan. Memoirs of the National Museum of Nature and Science, Tokyo, 52, 153⎼189.
  31. Takeda, M. & Miyake, S. (1969) Pilumnid crabs of the family Xanthidae from the West Pacific. II. Twenty-one species of four genera, with descriptions of four new species. Ohmu, 2, 93–156.
  32. Tirmizi, N.M. & Ghani, N. (1986) Range extension of a rare pilumnid crab into the northern Arabian Sea (Decapoda, Brachyura). Crustaceana, 51, 293⎼295. https://doi.org/10.1163/156854086X00458
  33. Türkay, M. & Schuhmacher, H. (1985) Latopilumnus tubicolus n. gen. n. sp., eine neue korallenassoziierte Krebbe, die Bildung einer Wohnhöhle induziert (Crustacea: Decapoda: Pilumnidae). Senckenbergiana maritima, 17, 55–63.