Chang-Mok Lee

A New Record of Campylaspis fusiformis (Crustacea: Cumacea: Nannastacidae) from Korea

This study dealt with cumacean specimens collected from the shallow waters of the South Sea and East Sea, Korea. Campylaspis fusiformis Gamo, 1960 belonging to the family Nannastacidae is newly recorded to Korean fauna. This species resembles C. pumila and C. striata in having a similar body form and a pair of narrow lateral sulcuses on the carapace, but it is easily distinguished from them by the dactylus of the pereopod 2 which is more than 3.5 times the length of the propodus and bears many setae (about 20) on the surface. This species mainly occurs in the Korean and Japanese waters.

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 Record of Gynodiastylis platycarpus (Cumacea: Gynodiastylidae) from Korea

Gynodiastylis platycarpus Gamo is redescribed as a new record of Korean fauna and a key to the Korean species of the genus is provided. This species is characterized by a slender body, a small telson, and a 3-articulated uropodal endopod.

A new species of the genus dimorphostylis (cumacea, diastylidae) from Korea

A new species, Dimorphostylis namhaedoensis (Cumacea, Diastylidae) is described on the basis of the specimens collected from southern shallow coast of Korean peninsula. The new species resembles four other species, D. asiatica, D. valida, D. hisuta and D. acroplicata, in having three apical spines on the terminal margin of the male telson and three pairs of the oblique ridges on the carapace, but are obviously distinguished from them in that the pattern of the ridges on the carapace is different and the third article of the antennular peduncle is very long in female. Furthermore, the dorsal carina of the female carapace has a row of forward spines and among the three apical spines of male telson, the median spine is much smaller than the lateral ones.

Taxonomic notes on two species of the genus Dimorphostylis (Crustacea, Cumacea, Diastylidae) from Korea

Abstract Through taxonomic survey of specimens collected from the coasts of Korea from 1993 to 2006, Dimorphostylis echinata Gamô, 1962 is new to Korean cumacean fauna. Especially, the adult male and female of D. echinata are described for the first time. Dimorphostylis sculpturensis Vassilenko and Tzareva, 1990 is proposed as a synonym of D. acroplicata Harada, 1960 in this research. Also, its female is redescribed for the first time in Korea.

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.

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.

Taxonomic Note on Nannastacus nyctagineus (Crustacea: Cumacea: Nannastacidae) from Korean Waters

Korean nannastacids have recorded only eight species belonging to genera Campylaspis and Cumella. In this paper, Nannastacus nyctagineus Gamȏ, 1962, is redescribed and illustrated as a new species of Korean fauna in this study for the first time. Korean female specimens of Nannastacus nyctagineus correspond well with the original description by Gamȏ, 1962 based on only female specimens. Gamȏ has described that new species, Nannastacus pruinosus could be distinguished from N. nyctagineus based on only male specimens. The Korean male specimens of N. nyctagineus undoubtedly match well with the description of N. pruinosus with the following common features: the surface of the carapace is covered with numerous granules; pereonites and pleonites have similar patterns of the teeth on dorsal surface; the proportion and armature of the dactylus of pereopod 2 is similar; the number and pattern arrangement of the setae on the surface in antenna 1, pereopod 1, and uropod are the all most same. Nannastacus pruinosus Gamȏ, 1962 is proposed as a synonym of N. nyctagineus described in this study. This represents the first record on the genus Nannastacus from Korea.

A New Species and a New Record of the Diastylidae (Crustacea: Cumacea) from Korea

In this study, a new species, Dimorphostylis breviplicata n. sp. is described and illustrated on the basis of specimens collected from the shallow Korean waters. This new species is similar to Dimorphostylis brevicaudata (Zimmer, 1903), Dimorphostylis acroplicata Harada, 1960 and Dimorphostylis valida Gamo, 1962 in that the carapace has three pairs of oblique ridges on the surface. However, the new species is distinguished by the combination of the following features: the middle oblique ridge is short and not joined to the other oblique ridges; the transverse ridge is absent on the frontal lobe; the dorso-median process on the pereonite 5 is only barely visible; the male telson has no short stout seta on the both lateral margins; the length ratio of the first to remaining articles combined on the male uropod is 1 : 0.7. A key to the Korean Dimorphostylis species is provided. Also, Diastylis alaskensis Calman, 1912 is redescribed as a new recorded species of the Korean fauna.