• Journal of Species Research
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• v.6 no.spc
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• pp.38-50
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• 2017

This study describes a new species of cytheroid ostracod, Paradoxostoma koreana sp. nov., collected in Korea. In addition, three other cytheroid ostracods, P. setoense Schornikov, 1975, Loxoconcha pulchra Ishizaki, 1968, and Ishizakiella miurensis (Hanai, 1957), are reported with brief descriptions and images. Paradoxostoma setoense and L. pulchra were previously only known from Japan, while I. miurensis was previously reported from Korea. Here, we describe variability in hemipenis morphology observed in the Korean population. The new species is closely related to several East Asian species, but its sister species is P. rhomboideum Okubo, 1977. The primary difference between the new species and P. rhomboideum is morphology of the distal projections of the hemipenis, but minor differences exist in the details of the cheatotaxy of other appendages. This report also provides a list of all East Asian Paradoxostomatidae.

• Animal Systematics, Evolution and Diversity
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• v.33 no.1
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• pp.37-44
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• 2017

The present census on freshwater bryozoans in the Han River, Geum River and in lentic water bodies in Gangwon Province revealed three gymnolaemate species. Two of them-Hislopia prolixa Hirose and Mawatari, 2011 and Victorella pavida Saville Kent, 1870 were recorded for the first time from South Korea. Paludicella articulata (Ehrenberg, 1831), on the other hand, had already been documented from a few sites since 1941. The bryozoans, all belonging to the order of Ctenostomata, were found on a variety of substrates in freshwater (H. prolixa and P. articulata) and brackish habitats (V. pavida). Hislopia prolixa had recently been established as a new species and this is the first record for an occurrence outside of Japan, where it had been newly described from Lake Biwa and nearby satellite lakes.

• Journal of Species Research
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• v.7 no.1
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• pp.92-96
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• 2018

In 2017, during a survey of the anthozoan fauna in the Hallyeohaesang National Park in the South Sea, several Acanthogorgia specimens were collected from the subtidal zone. Through taxonomic analysis, one species, Acanthogorgia densiflora $K{\ddot{u}}kenthal$ & Gorzawsky, 1908, was found to be previously unreported from Korea, and was, therefore, newly added to the list of Korean anthozoan fauna. This species is distributed on the slopes of the rocky substratum between depths of 14 and 24 m. Including the findings from this study, ten species of the genus Acanthogorgia have thus been reported from the Korean waters until now.

• Ocean and Polar Research
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• v.37 no.4
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• pp.287-293
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• 2015

A species of edible Scyphomedusae jellyfish has been used as food by the local people in Ganghwado, Korea since the 1990s. In order to identify this jellyfish, we collected specimens in Ganghwado during September 2013, and compared these specimens with original descriptions made by Kishinouye (1890). Mitochondrial cytochrome oxidase subunit 1 (CO1) sequences of these specimens were compared with those of Rhopilema esculentum retrieved from GenBank. Our specimens were also compared with jellyfish collected in China, previously confirmed as R. esculentum, based on morphological characters and DNA sequences. Using these two methods, the jellyfish specimens caught in Ganghwado were correctly identified as R. esculentum, a species new to Korean waters. This edible jellyfish has been named 'Gisusik-Yonghaepari' as Korean name.

• Journal of Life Science
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• v.9 no.5
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• pp.531-536
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• 1999

As an attempt to preserve resources in marine biological organisms, we first constructed a cDNA library from the red alga Porphyra yezoensis. The library construction method from P. yezoensis consists of three steps; those include protoplast presparation, RNA isolation, and phage library construction. Protoplast was prepared in order to remove much of the carbohydrate compounds which are characteristics of algal cell walls. Carbohydrate contamination in the purified RNA may inhibit further enzyme reactions, those carbohydrates should be removed. RNA samples prepared from protoplast still seemed to contain residual amount of carbohydrate because mRNA isolation with conventional method failed. We therefore developed a method with Poly ATtract mRNA isolation system. The constructed phage library was tested by analyzing cDNA insert in phage vector from randomly picked ten independent white plagues. All of the phages contained cDNA inserts with sizes ranging 0.5kb and 2.0kb.

• Journal of Species Research
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• v.1 no.2
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• pp.175-217
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• 2012

Thirteen species of sea lice (Copepoda, Caligidae) are described as parasites of marine fishes from Korea including three new species such as Pseudocaligus longipes n. sp. from Siganus fuscesens (Houttuyn), Lepeophtheirus tamladus n. sp. from Sebastes inermis Cuvier, and Lepeophtheirus gusevi n. sp. from Sebasetes schlegeli Hilgendorf. Remaining ten species are new to Korea: Caligus elongatus Nordmann, 1832; C. equulae Ho and Lin, 2003; C. fistulariae Yamaguti, 1936; C. laticaudus Shiino, 1960; C. rotundigenitalis Y$\ddot{u}$, 1933; Metacaligus uruguayensis (Thomsen, 1949); Lepeophtheirus atypicus Lin, Ho and Chen, 1996; L. parvulus Shiino, 1952; Anuretes quadrilaterus Shiino, 1954; and Pseudanuretes chaetodontis Yamaguti, 1936.

• Korean Journal of Ichthyology
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• v.25 no.1
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• pp.42-45
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• 2013

Single specimen (68 mm TL) of the Shiho's seahorse Hippocampus sindonis collected from Geomun Island was described as a first record from Korea. The species is characterized by having 15 dorsal fin-rays, 14 pectoral fin-rays, snout length 2.8 in HL, trunk rings 10, and tail rings 37. A new Korean name, "Sin-do-hae-ma" is proposed.

• Journal of the Korean Professional Engineers Association
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• v.12 no.4
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• pp.26-31
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• 1979

The Natural Gas and petroleum have the same Origin, Namely, Ocean bottom deposits of the marine plant, plankton which are subdued to the biological action of the bacterium under the anaerobic circumstance, and changed to the hydrocarbon gas and oils. and such resources are appeared in the aqueous sedimentary rocks in the tertiary. There are three types of gas field, which are oil well gas field, structural gas field and water soluble gas field.

• Journal of Species Research
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• v.2 no.1
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• pp.7-14
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• 2013

During a systematic study on Korean nudibranchs, two phyllidiid and two polycerid species were collected and identified with examination of their external morphological characters. As a result of the study, two phyllidiid species, Phyllidia ocellata Cuvier, 1804 and Phyllidiella pustulosa (Cuvier, 1804) were redescribed since there was no descriptions of these species with Korean specimens. And two polycerid species, Thecacera pennigera (Montagu, 1815) and Triopha catalinae (Cooper, 1863) were described as new to Korean fauna. Diagnostic characters of these species are described with illustrations in this study. DNA barcode data from three species examined were also provided for a supplement to morphological identifications.

• ALGAE
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• v.24 no.2
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• pp.79-83
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• 2009

Recently deschbed new species, Cladosiphon umezakii Ajisaka (Ectocarpales,Phaeophyceae) is reported in Korea based on morphology and plastid rbcL sequences. Cladosiphon umezakii occurred on low intertidal to subtidal zone along the south and southeast coasts in Korea. Thalli are gold to dark brown, ercct, cylindrical, irregularly branched,and very mucoid. Unitocular zoidangium is developed at the base uf assimilatory filaments. Assimilatory filaments are very long. Eight specimens of the pecies collected from Korea clustered with those of C. umezakii in Japan in rbcL tree. The pecies showed a sister relationship with C. okamuranus. The occurrence of this warm water species is thought an example of northward migration of marine algae caused by global warming. Because C. umezakii is of the economica! importance of the genus as foods and medidnes, the study on mass culture of the species is necessary in korea.