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Abstract
Four new species and two new genera belonging to the family Oedicerotidae are reported from Korea and Vietnam. Two new genera, Orthomanus and Imbachoculodes are described, with three new species, namely Orthomanus koreanus gen. et sp. nov., Imbachoculodes namhaensis gen. et sp. nov. and Imbachoculodes vietnamensis gen. et sp. nov. The monotypic genus Orthomanus is characterized by the very short carpi and transverse palms of gnathopods 1 and 2, the reduced dactyli on pereopods 3–6, and the greatly enlarged distolateral spine-tooth on the outer plate of maxilla 1. Imbachoculodes has slender gnathopods 1 and 2 with elongated carpi, pereopods 3 and 4 with elongated dactyli, and a narrow basis of pereopod 7. The fourth new species, Sinoediceros hwanghaensis sp. nov. has a greatly reduced flagellum on antenna 2, a broadened meri on pereopods 3 and 4, and an elongated maxilliped outer plate. Keys are provided to 1) the North Pacific genera of the Synchelidium group, 2) species of Imbachoculodes, and 3) species of Sinoediceros.
Acknowledgements
We cordially thank Dr Ko Tomikawa of Hiroshima University, Japan for his useful commentary on an earlier draft and Dr J.M. Lee of Daegu University, Korea for providing valuable papers. We are indebted to Dr Xiao-Chun Wu of the Canadian Museum of Nature, Canada for his translation of the Chinese paper consulted in this study. We greatly appreciate the suggestions and comments made by Dr E.L. Bousfield and anonymous reviewers, including Dr L.E. Hughes of the Australian Museum, Australia, which greatly improved the manuscript. This research was supported by a grant (no. 2007-491-1) from the Ministry of Environment of the Korean Government awarded to the corresponding author and by the National Research Foundation of Korea grant funded by the Korean Government (NRF-2009-352-C00121) awarded to the first author.