• Animal Systematics, Evolution and Diversity
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• v.13 no.1
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• pp.61-72
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• 1997

Two new coexisting sepcies of the genus Bathynella of the Bathynellidae is described from North America. B. germanitas n. sp. is easily recognized by the basidorsal existence of cylindrical protrusion with a seta on endopod of uropod, whereas B. fraterna n. sp. is characterized by by the setal nature of exopod of thoracopods II-Vll.

• Animal Systematics, Evolution and Diversity
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• v.34 no.3
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• pp.127-142
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• 2018

A new species of Eudactylopus Scott A., 1909 is described from the southern coast of Korea. The specimens were collected using a light trap set overnight at the entrance near a pier. Eudactylopus yokjidoensis n. sp. is similar to E. andrewi Sewell, 1940 and E. spectabilis (Brian, 1923) in two key respects: similar length of proximal and distal inner setae on female P2 enp-2, and modification of two subapical setae on male P2 endopod. However, E. yokjidoensis can be differentiated from the two species by following morphological characteristics: in females, the length ratio of cephalothorax/2nd-4th thoracic somites combined is smaller in E. yokjidoensis than other two species (1 : 0.8 vs. 1 : 1); antennule has nine segments (vs. 7-segmented in E. andrewi); P2 to P4 each bears a process in medial distal margin of basis, while it is just smooth in E. spectabilis; in males; the length ratio of cephalothorax to 2nd-4th thoracic somites combined is smaller in E. yokjidoensis than other two species (1 : 0.6 vs. 1 : 1 in E. andrewi and 1 : 0.8 in E. spectabilis); and P5 exopod has a comb-like innermost seta, while it is bipinnate seta in E. spectabilis. To prove the Korean species of Eudactylopus to be new, full descriptions of both sexes are given here, and the claim is supported by distinct genetic differences between E. yokjidoensis and E. spectabilis (22.3-22.7%) in the mitochondrial gene cytochrome oxidase subunit I(mtCOI) sequence.

• Animal cells and systems
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• v.5 no.1
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• pp.11-15
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• 2001

The first zoeal stage of Enosteoides ornata (Stimpson, 1858) is described and illustrated in detail. Its morphological characteristics are compared with those of other known species of the family Porcellanidae. In the family Porcellanidae its diagnostic characteristics are the exopod of an antenna armed with a seta and five spinules and the coxa of the first maxilliped having two setae. The former characteristic can be seen in most of the genus Petrolisthes zoeas, while the latter usually in the genus Pachycheles zoea. The Enosteoides ornata seems to be p1aced intermediately between the genus Pachycheles and the genus Petrolisthes based on the zoeal morphology.

• Korean Journal of Environmental Biology
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• v.33 no.2
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• pp.132-139
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• 2015

The genus Halectinosoma Vervoort, 1962 is first reported from Korean waters by the discovery of H. perforatum $It{\hat{o}}$, 1981. This species, previously recorded only from Japan, is collected from the sandy beach on the south coast of Korea, and is well distinguished from other congeners by the combination of following morphological characteristics: the elongate caudal ramus; the remarkably bilobated exopod of female P5; the small innermost seta on the distal margin of female P5 exopod; the presence of three setae on the distal exopodal segment in P4; and the presence of scale-like spinules on the ventral surfaces of urosomite. We herein provide detailed description and illustrations of this species.

• Fisheries and Aquatic Sciences
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• v.18 no.3
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• pp.321-324
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• 2015

The first zoeal characters of Sesarmops intermedius (De Haan, 1835) [=Sesarma (Sesarma) intermedium], belonging to the family Sesarmidae, are described and illustrated in detail based on laboratory-hatched material from a female collected from Gangjeung, Seogwipo, Jeju Island. Morphological comparison is performed based on previous descriptions of Sesarma (Sesarma) intermedium from Japan and three other species in the Sesarmidae. The first zoea of Sesarmops intermedius can be readily distinguished from those of the three species Chiromantes haematocheir [=Sesarma (Holometopus) haematocheir], Chiromantes dehaani [=Sesarma (Holometopus) dehaani], and Parasesarma pictum [=Sesarma (Parasesarma) pictum] by the presence of two setae on the exopod of the antenna, fine setae on the inner and outer margin of the forked spine of the telson, and three aesthetascs and one simple seta on the antennule.

• International Journal of Automotive Technology
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• v.1 no.1
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• pp.26-34
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• 2000

The new numerical procedure for hydroplaning has been developed by considering the following three important factors; fluid/structure interaction, tire rolling, and practical tread pattern. The tire was analyzed by FEM with Lagrangian formulation and the fluid is analyzed by FVM with Eulerian formulation. Since the tire and the fluid are modeled separately and their coupling is automatically computed by the coupling element, the fluid/structure interaction of the complex geometry such as the tire with the tread pattern can be analyzed practically. We verified the predictability of the hydroplaning simulation in the different parameters such as the water flow, the velocity dependence of hydroplaning, and the effect of the tread pattern on hydroplaning. In order to predict the streamline in the contact patch, the procedure of the global-local analysis was developed. Since the streamline could be predicted by this technology, we could develop the new pattern in a short period based on the principle; "make the stream line smooth".

• Animal Systematics, Evolution and Diversity
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• v.16 no.1
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• pp.113-122
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• 2000

Diaphanosoma dubium Manuilova, frequently confused with the species group of D. brachyurum Lieven and misidentified as an invalid species of D. leuchtenber-gianum Fischer in the Far East, was redescribed and illustrated. Redescription was based on the materials collected from various freshwater habitats at 76 localities in South Korea during the period from May 1978 to June 1999. Previous records of Diaphanosoma species from Korea were examined. D. dubium is well distinguished from other related species by having large head, longer swimming antennae with a thin seta on the outer distal side of basipod, carapace lacking dorsal spine at the posterior carapace margin, and fewer denticles on the ventro-posterior carapace margin.

• Animal Systematics, Evolution and Diversity
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• v.36 no.2
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• pp.167-174
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• 2020

A halacarid species of the genus Copidognathus is newly reported from Korea: C. daguilarensis Bartsch, 1997, which was described from Hong Kong. It is redescribed herein with detailed illustrations. Korean specimens coincide well with the original description, however, they showed two minor morphological discrepancies from it: quite shorter second palpal segment than the fourth and a modified dorsal seta on the second palpal segment. Korean specimens were rather smaller than the type specimens from Hong Kong, however, they did not show significant differences in the length to width ratios of important body parts. The number of perigenital setae was more variable in the Korean males, ranged 24-29 setae, versus 25-26 in Hong Kong's. Copidognathus daguilarensis is reported for the first time outside the type locality, and joins as the second member of the gibbus group in the northwest Pacific.

• Animal Systematics, Evolution and Diversity
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• v.32 no.3
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• pp.207-218
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• 2016

A harpacticoid copepod, Microarthridion littorale (Poppe, 1881), is newly recorded in Korea. Microarthridion species can be distinguished from each other by a combination of the number of the antennular segment, the number of the seta on the antennary exopod, and the armature of the thoracopod legs. Korean materials examined coincide well with M. littorale on these well-known characteristics. However, there are some minor differences in the ornamentations of the maxilliped and swimming legs. The specimens show additional sexual dimorphisms in the setae on enp-3 of P1 and exp-3 of P2-P4. Morphological diversity of so-called M. littorale is also discussed here with detailed features.

• Animal cells and systems
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• v.2 no.4
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• pp.427-434
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• 1998

Canthocamptus morimotoi Miura, a cave-dwelling harpacticoid species belonging to C. mirabilis species group, is fully redescribed and illustrated on the basis of the material newly collected from the type locality, Simpigul Cave, South Korea. C. morimotoi is the only genuine subterranean species in the C, mirabilis group, and claimed to be a relict species restricted to its type locality. The sexually isomorphic ornamentation of the outer terminal seta on the distal exopodal segment of male leg 4 and the well-developed spines on the disteromedial corner of anal somite are the most significant features differentiating this species from ther members of the mirabilis-group.