Abstract
A marine biodiversity expedition was carried out from 7 November to 22 November 2009 in Kumejima Island, the RyukyuArchipelago, southwestern Japan. The dredge and trawl samplings from 10 to 147 m depths yielded five gnathiid speciesincluding three new Gnathia species. In this paper, these three new species are described based on male morphologies and three morphotypes of larvae are also described.References
Camp, D.K. (1988) Bythognathia yucatanensis, new genus, new species, from abyssal depths in the Caribbean Sea, with a list of gnathiid species described since 1926 (Isopoda: Gnathiidea). Journal of Crustacean Biology, 8(4), 668–678.
Coetzee, M.L., Smit, N.J., Grutter, A.S. & Davies, A.J. (2008) A new gnathiid (Crustacea, Isopoda) parasitizing two species of requiem sharks from Lizard Island, Great Barrier Reef, Australia. Journal of Parasitology, 94(3), 608–615.
Coetzee, M.L., Smit, N.J., Grutter, A.S. & Davies, A.J. (2009) Gnathia trimaculata n. sp. (Crustacea: Isopoda: Gnathiidae), an ectoparasite found parasitising requiem sharks from off Lizard Island, Great Barrier Reef, Australia. Systematic Parasitology, 72, 97–112.
Cohen, B.F. & Poore, G.C.B. (1994) Phylogeny and biogeography of the Gnathiidae (Crustacea: Isopoda) with descriptions of new genera and species, most from south-eastern Australia. Memoirs of Museum of Victoria, 54(2), 271–397.
Hansen, H.J. (1916) Crustacea Malacostraca III. Isopoda. The Danish Ingolf Expedition, 3(5), 1–262.
Kensley, B., Schotte, M. & Poore, G.C.B. (2009) Gnathiid isopods (Crustacea: Isopoda: Gnathiidae), mostly new, from the Indian Ocean. Proceedings of the Biological Society of Washington, 122(1), 32–51.
Monod, T. (1926) Les Gnathiidae. Mémories de la Société des Sciences Naturelles du Maroc, 13, 1–668.
Müller, H.-G. (1993) Gnathiidae from coral reefs in the Tioman Archipelago, Malaysia, with description of two new species (Crustacea: Isopoda: Cymothoidea). Mitteilungen aus dem Zoologishen Museum in Berlin, 69, 3–17.
Ota, Y. (2010) Seasonal fluctuations of the sponge dwelling gnathiid Elaphognathia nunomurai (Isopoda; Gnathiidae). Cancer, 19, 1–9. (in Japanese)
Ota, Y. (2011) A New Species of the Gnathiid Isopod, Gnathia teruyukiae (Crustacea: Malacostraca), from Japan, Parasitizing Elasmobranch Fish. Bulletin of the National Museum of Nature and Science, Series A, Supplement, 5, 41–51.
Ota, Y. & Hirose, E. (2009a) Description of Gnathia maculosa and a new record of Gnathia trimaculata (Crustacea, Isopoda, Gnathiidae), ectoparasites of elasmobranchs from Okinawan coastal waters. Zootaxa, 2114, 50–60.
Ota, Y. & Hirose, E. (2009b) Gnathia nubila n. sp. and a new record of Gnathia grandilaris (Crustacea, Isopoda, Gnathiidae) that parasitizes elasmobranchs from Okinawan coastal waters, Japan. Zootaxa, 2238, 43–55.
Ota, Y., Tanaka, K. & Hirose, E. (2007) A new species of Gnathia (Isopoda: Cymothoida: Gnathiidae) from Okinawajima Island, Ryukyu Archipelago, Southwestern Japan. Zoological Science, 24, 1266–1277.
Ota, Y., Tanaka, K., Hirose, M. & Hirose, E. (2010) Description of a new species of Elaphognathia (Isopoda: Gnatheidae) from Japan based on morphological and molecular traits. Journal of Crustacean Biology, 30(4), 710–720.
Pires, A.M.S. (1996) The gnathiids from the Brazilian southeastern continental shelf and slope: distribution, ecological notes and description of three new species. Spixiana, 19(1), 1–16.
Shimomura, M. & Tanaka, K. (2008) A new species of Thaumastognathia Monod, 1926 from Japan (Isopoda, Gnathiidae). Crustaceana, 81(9), 1091–1097.
Schultz, G.A. (1966) Submarine canyons of southern Calfornia. Part IV. Systematics: Isopoda. Marine isopods of the submarine canyons of the southern Californian continental shelf. Allan Hancock Pacific Expeditions, 27(4), 1–56.
Smit, N.J. & Davies A.J. (2004) The curious life-style of the parasitic stages of gnathiid isopods. Advances in Parasitology, 58, 289–391.
Svavarsson, J. (1999) The deep water gnathiid Caecognathia bicolor (Hansen, 1916) (Crustacea, Isopoda, Gnathiidae) –redescription and new data on its distribution–. Rit Fiskideildar, 16, 171–185.
Tanaka, K. (2004) A new species of Gnathia (Isopoda: Cymothoida: Gnathiidae) from Ishigaki Island, the Ryukyus, southwestern Japan. Crustacean Research, 33, 51–60.
Tanaka, K. (2005) A new genus and species of gnathiid isopod (Isopoda, Gnathiidae) from the Ryukyus, southwestern Japan. Journal of Crustacean Biology, 25(4), 565–569.