Young-Hyo Kim

New Record of Two Species of Ampelisca (Crustacea: Amphipoda: Ampeliscidae) from Korea

Two species of gammaridean amphipod are newly recorded from the shallow Korean waters; Ampelisca alatopedunculata Ren and A. miharaensis Nagata. These are described and figured in detail. A key to the Korean Ampelisca species is provided.

Two New Records of Lamprops Species (Cumacea, Lampropidae) from Korea

Two newly recorded species belonging to the genus Lamprops, family Lampropidae found in the East Sea (Sea of Japan) of Korea are reported: Lamprops carinatus Hart, 1930 and L. pseudosarsi Tsareva and Vassilenko, 1993. Lamprops carinatus is characterized by having a smooth carapace without oblique ridges and one long and two pairs of terminal unequal setae on the telson. Lamprops pseudosarsi is easily distinguished by having two pairs of oblique ridges on the carapace and one long and two pairs of terminal subequal setae on the telson. The collected specimens were congruent with the original descriptions, except for several minor differences. This is the first record of the genus Lamprops from Korea. Especially, new information on the mouthparts of these species is given, and the male of L. pseudosarsi is described for the first time. Keys are also provided to the Korean genera of the Lampropidae and species of Lamprops.

A new species of Socarnes Boeck, 1871 (Crustacea, Amphipoda, Lysianassidae) from Korean waters

Abstract A new species of lysianassid amphipod belonging to the genus Socarnes Boeck was collected from Korean coastal waters. This is the first record of the genus Socarnes from Korea. The new species is fully illustrated and extensively compared with related species. A key to Socarnes speciesis provided.

New genera and species of the Synchelidium group (Amphipoda: Oedicerotidae) from Asia-North Pacific

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.

Four Species of the Genus Atylus from Korea (Crustacea: Amphipoda: Dexaminidae)

Four species of the genus Atylus belonging to the family Dexaminidae are reported from the eastern and southern coasts of Korea. Three of these species are redescribed as new records of this country: Atylus (Atylus) ekmani (Gurjanova), A. (A.) matsukawaensis Hirayama and Takeuchi and A. (Kamehatylus) japonicus Nagata.

A New Species of the Genus Paradexamine (Crustacea: Amphipoda: Dexaminidae) from Korea

Abstract Paradexamine jindoensis n. sp. belonging to family Dexaminidae was collected from Jindo Island, Korea. The new species is fully illustrated and compared with related congeners. The new species resembles highly P. houtete, in having the tooth formulae of dorsal pleonites, 1–3–3–3, rear to front and in bearing short spines on the mandible. However, it is characteristic in having the several morphological differences of mouth parts, slender appendages, and longer peduncular article 2 of antenna 1 than article 1.

Two new records of dimorphostylis (crustacea, cumacea, diastylidae) from Korea

Two diastylid species, Dimorphostylis manazuruensis Gamô (1960) and Dimorphostylis longicauda Gamô (1962), are recorded as new to Korean cumacean fauna. The subadult male of D. longicauda is described for the first time. As a result, the genus Dimorphostylis found in Korean waters now consists of eight species.

Two New Records of the Eocuma Species(Crustacea, Cumacea, Bodotriidae) from Korea

Two cumaceans species, Eocuma amakusense Gamô, 1967 and E. latum Calman, 1907, belonging to the family Bodotriidae are collected from the southern sea in Korea, and are redescribed. At the present, just one species belonging to the genus Eocuma, E. cf. hilgendorfi Marcusen, 1894 has been reported in Korea. Herein we add two Eocuma species to the Korean cumacean fauna and described them with full illustration contained new information of mouthparts. A key to the Korean Eocuma species is also provided.

First Recorded Family Synopiidae (Crustacea: Amphipoda) from the Korean Waters

A newly recorded species of gammaridean amphipod, Synopia (Telsosynopia) trifidilla Hughes and Lowry, 2006 belonging to the family Synopiidae Dana, 1853 was collected from the southern Korean coasts. Synopia (Telsosynopia) trifidilla Hughes and Lowry is characterized by the entire telson with a trifid apical margin. The species is described and fully illustrated in the present study. This is the first record of the family Synopiidae from Korea.

Bodotria jejuensis sp. nov. (Crustacea, Cumacea, Bodotriidae), a new Korean cumacean

A new species of Cumacea belonging to the genus Bodotria Goodsir, 1843 was collected from the Jeju-do Island, Korea. The new speices, Bodotria jejuensis sp. nov. is similar to B. similis Calman, 1907, B. rugosa Gamô, 1963, B. carinata Gamô, 1964, and B. biplicata Gamô, 1964 in having a pitted carapace, prominent dorso-lateral carina, and unarticulated endopod of uropod. However, longish elliptical shape of carapace, well-developed dorso-lateral carina and distinct lateral ridge are the major characteristics which serve to distinguish the new species from its congeners. The new species is fully illustrated and extensively compared with related species. A key to the Korean Bodotria species is also provided.