Journal of Species Research, 국립생물자원관

PDF Citaion An unrecorded ascomycetous yeast species, Metschnikowia rancensis, isolated from flower, Pseudocydonia sinensis in Korea

최윤희(국립농업과학원) ; 허준(농촌진흥청 국립농업과학원) ; 김이슬(농촌진흥청 국립농업과학원) pp.1-5

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During a survey of microbial diversity in the Republic of Korea, three unrecorded ascomycetous yeast strains were isolated from flower, Pseudocydonia sinensis. Three strains, designated as SINF-1Y (KACC 410756), SINF-2Y (KACC 410757), and SINF-3Y (KACC 410758), were subjected to sequence analysis of the D1/D2 domain of the large subunit (LSU) rRNA gene, observation of colony morphology, and determination of carbon assimilation patterns. The phylogenetic analysis of sequences identified three strains as Metschnikowia rancensis, belonging to the family Metschnikowiaceae, order Saccharomycetales, class Saccharomycetes within the phylum Ascomycota. Morphological characterization revealed ellipsoidalshaped and polar budding cells that formed smooth and cream-colored colonies with entire margins. Three strains were distinguishable from the closely related strains in there assimilation of carbon sources. Based on the phylogenetic, morphological, and biochemical traits, three strains were determined as a previously unrecorded yeast species, Metschnikowia rancensis, in the Republic of Korea.

PDF Citaion The seven species of the genus Cymbella (Bacillariophyta), previously unknown from the inland water of South Korea

조경제(인제대학교) pp.6-19

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During an extensive survey of Cymbella diatoms in freshwater bodies in South Korea, seven species that had not been previously reported in this country were documented. The two species recently reported as new to science in China, C. compactiformis B. Liu & Williams and C. distalebiseriata B. Liu & Williams, have been confirmed to exist in the Korean fresh water. The existence of two subspecies, Cymbella neoleptoceros var. tenuistriata Krammer and C. tropica var. tenuipunctata Krammer is known; most C. neoleptoceros Krammer assemblages observed here are mainly the variety, while in the case of C. tropica Krammer, most are the nominate variety and the variety is rare. In addition, the two diatom species, C. maggiana Krammer and C. subcistula Krammer, were identified in this region. Taxonomically redefined Cymbella excisa Kützing was observed at considerable frequency in the local area. Among these, three taxa, Cymbella compactiformis, C. neoleptoceros var. tenuistriata and C. subcistula, have large variations in the size of valves and also large variability in the valve morphology within each assemblage.

PDF Citaion Three new species of Pseudomacrochiron Reddiah, 1966 (Copepoda, Cyclopoida, Macrochironidae) and reassignment of Kelleria gurneyi Sewell, 1949

문성용(국립수산과학원 남해수산연구소) ; 홍재상(국립수산과학원 남해수산연구소) ; 김일회(한국연안생태연구소) pp.20-37

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Three new species of the genus Pseudomacrochiron are described, two of them from Phuket, Thailand and one from both Phuket and the south coast of Korea. As distinguishing features of these new species, the caudal ramus of the female is about 4.5 times longer than wide in Pseudomacrochiron acutirostre n. sp. and P. bellum n. sp. and 1.90 times longer than wide in P. eurydatum n. sp.; in all the three new species the mandible bears 15 to 18 spinules along the inner margin, the maxilla bears a cusp on the concave margin of the distal lash of the maxilla, and the exopod of female leg 5 is armed with one spine plus one seta; and the ratio of the length to the width of the exopodal segment of female leg 5 is 2.17 : 1 in P. acutirostre n. sp., 1.80 : 1 in P. bellum n. sp., and 4.50 : 1 in P. eurydatum n. sp. Kelleria gurneyi Sewell, 1949 which has been remained as a species inquirenda is redescribed based on newly collected specimens from Kosrae Island, Micronesia, and transferred to the genus Pseudomacrochiron as P. gurneyi (Sewell, 1949) n. comb. A tabular key to distinguish twelve known species of Pseudomacrochiron is provided.

PDF Citaion New record of four spirotrichs (Protozoa, Ciliophora) from South Korea

최지혜(강릉원주대학교) ; Atef Omar(강릉원주대학교) ; 정재호(강릉원주대학교) pp.38-47

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During a field survey of Korean ciliates, we collected four newly recorded species from different habitats, namely, Apokeronopsis sinica Liu et al., 2009; Diophrys japonica Hu, 2008; Neokeronopsis asiatica Foissner et al., 2010; and Pseudoamphisiella lacazei (Maupas, 1883) Song, 1996. The morphology of these species was investigated based on the observation of living cells, protargol-impregnated specimens and in scanning electron microscope. In this study, we provide a brief diagnosis, remarks, and photomicrographs for each species. Furthermore, we studied the phylogenetic position of P. lacazei because the Korean population has pretransverse cirri (vs. lacking in the authoritative Chinese population).

PDF Citaion The marine amphipods (Arthropoda: Crustacea: Malacostraca) fauna from Ulleungdo Island in Korea

신소연(단국대학교) ; 최재홍(단국대학교) ; 김준(단국대학교) ; 김경원(단국대학교) ; 한성호(단국대학교) ; 김영효(단국대학교) pp.48-73

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A faunal study on amphipods in Ulleungdo Island was conducted during the spring and summer periods in 2023. In this study, 64 amphipod species in 39 genera, 22 families were founded. Including previous studies, a total of 75 species of amphipods were reported in Ulleungdo Island. Among these 22 families, the family Caprellidae with 17 species showed the highest abundance. Ampithoidae with 5 species was subdominant family. Protohyale (Boreohyale) triangulata Hiwatari, 2003 belonging to the family Hyalidae, was identified at 16 of the 27 sites and had the highest frequency of appearance among the total species. Among the 64 species, Aoroides longimerus Ren & Zheng, 1996, Melita panda Tomikawa, Yamato & Ariyama, 2024, and Vibilia australis Stebbing, 1888 are newly recorded species in Korean fauna. The newly recorded species are fully illustrated and compared with related species. We provide an amphipod fauna in Ulleungdo Island with a list, figures, and tables.

PDF Citaion Characterization of two unrecorded yeast species in the families Cystobasidiaceae and Sporidiobolaceae isolated from Craspedonotus tibialis and mountain soil in Korea

황희현(서울여자대학교) ; 배재우(서울여자대학교) ; SrinivasanSathiyaraj(서울여자대학교) pp.74-80

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The purpose of this study was to isolate and identify wild yeasts from Craspedonotus tibialis samples in Taean-gun and soil samples in Uijeongbu-si, Republic of Korea. Out of the sixteen strains identified, fourteen had been previously recorded, whereas two strains were unrecorded in the Republic of Korea. Identification of wild yeast strains was performed through pairwise sequence comparisons of the D1/D2 region of the 26S rRNA gene using the Basic Local Alignment Search Tool (BLAST) (Fell et al., 2000). Cell morphology was examined using a phase contrast microscope, and assimilation tests were conducted with the API 20C AUX kit. All strains were classified under the phylum Basidiomycota. The two unrecorded yeast strains, CB9-2 and YP99, are classified under the genus Cystobasidium (family Cystobasidiaceae, order Cystobasidiales, class Cystobasidiomycetes) and the genus Rhodosporidiobolus (family Sporidiobolaceae, order Sporidiobolales, class Microbotryomycetes), respectively. These two strains exhibited morphologies consistent with their type species. Both CB9-2 and YP99 cells were oval, and both strains demonstrated polar budding. This study highlighted the morphological and biochemical characteristics of the two unrecorded yeast species that had not been previously documented in Korea.

PDF Citaion A newly recorded species of the genus Phronima (Amphipoda, Hyperiidea, Phronimidae) from off Jeju Island, Korea

김준(단국대학교) ; 서호영(전남대학교) ; 김영효(단국대학교) pp.81-85

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A newly recorded species, Phronima solitaria Guérin-Méneville, 1844, belonging to the family Phronimidae Rafinesque, 1815, was collected during a pelagic zooplankton survey in the Jeju Sea of Korea. This species is characterized by the presence of a strong single protuberance on the carpus of pereopod 5. Phronima solitaria is morphologically similar to P. atlantica Guérin-Méneville, 1836, and P. sedentaria (Forskål, 1775), however, it is distinguished from other congeneric species by the length of pleonite 1 compared to pereonite 7, the single protuberance on the carpus of pereopod 5, and the subequal lengths of both rami on all uropods. In the present study, a newly recorded species is illustrated and compared to related species. A key to species of the family Phronimidae from Korean waters is also provided.

PDF Citaion Morphology and molecular phylogeny of controversial tintinnids Tintinnopsis fimbriata and T. uruguayensis (Protozoa: Ciliophora) collected from coastal waters of South Korea

문지혜(강릉원주대학교) ; 정재호(강릉원주대학교) pp.86-95

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Two tintinnid species with stout campanulate loricae were collected from coastal waters of the Yellow Sea, South Korea. These species were identified as Tintinnopsis fimbriata Meunier, 1919 and T. uruguayensis Balech, 1948. The loricae morphology of fixed cells from both species was examined under light and scanning electron microscopes. Also, the phylogenetic positions of the two species were inferred using the gene sequences from SSU rDNA, ITS1, 5.8S rDNA, and ITS2. They share very similar loricae that consist of an obconical collar, a globular bowl, and a cylindrical posterior process. However, T. fimbriata can be distinguished from T. uruguayensis by the lorica size (61-71×34-41 μm vs. 52-61×23-29 μm) and the ratio of lorica length to collar opening diameter (1.6-1.8 vs. 1.9-2.7). The two species showed high similarity to each other as follows: 99.86% (2 nucleotide differences) in SSU rDNA and 99.76% (1 nucleotide difference) in ITS1-5.8S rDNA-ITS2. Given the morphological and molecular similarities between the Korean T. fimbriata and T. uruguayensis, as well as the discrepancies between the neotype of T. fimbriata and its original description (e.g., posterior process of the lorica), further studies are required to clarify their conspecificity or the potential existence of sibling species.

PDF Citaion Taxonomic reassessment of the Korean Leptochiton rugatus (P. P. Carpenter, 1892) (Leptochitonidae: Polyplacophora)

박진아(이화여자대학교 에코과학부) ; 김유경(이화여자대학교) ; 박중기(이화여자대학교) pp.96-105

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Leptochiton Gray, 1847 is the most well-known and species-rich genus within the family Leptochitonidae. Species of this genus inhabit a wide range of marine environments, from shallow coastal waters to cold, deepsea habitats. Due to the lack of distinctive morphological characters among congeneric species, the taxonomy of the genus has been complicated, making it difficult to distinguish between species based solely on external features. Recent studies using detailed morphological data obtained from scanning electron microscopy (SEM) have uncovered many cryptic species within the genus. L. rugatus (P. P. Carpenter, 1892) was once considered a single, widely distributed species across the northern Pacific. However, recent analysis incorporating morphological and molecular data have revealed that it is species complex that comprises several cryptic species. Over the last several decades, L. rugatus has been included in the National list of species in Korea with detailed descriptions, illustrations, SEM images, and distribution information. In this study, we reassessed the taxonomy of Korean L. rugatus species based on a comprehensive analysis of both morphological and molecular data (mtDNA cox1). The results from morphological and molecular phylogenetic analyses, referring to their geographic distribution information, revealed that L. rugatus species previously recorded in Korean waters should be taxonomically revised as L. subrugatus Sirenko & Sigwart, 2021. Based on this updated taxonomic information, we provide a detailed description of the microstructures of valves, girdle (perinotum and hyponotum), and radula for L. subrugatus from Korea.

PDF Citaion Seven monogonont rotifers newly recorded in Korea (Rotifera: Monogononta)

양희민(인하대학교) ; 민기식(인하대학교) pp.106-115

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Surveys conducted in various habitats across Korea from 2021 to 2023 resulted in the identification of seven previously unrecorded species of monogonont rotifers: Testudinella tridentata Smirnov, 1931, Brachionus kostei Shiel, 1983, Squatinella lamellaris (Müller, 1786), Squatinella longispinata (Tatem, 1867), Notommata copeus Ehrenberg, 1834, Trichocerca cavia (Gosse, 1886), and Trichocerca taurocephala (Hauer, 1931). Squatinella longispinata was discovered in soil samples, while the other six species were collected from freshwater habitats. Studies on many monogonont taxa, particularly the illoricated group, have been insufficient in Korea, but ongoing research continues to discover unrecorded species in freshwater and other environments. These findings underscore the importance of comprehensive surveys in diverse habitats, such as soils or saline waters, to fully understand the biodiversity of monogonont rotifers in Korea. Morphological diagnoses accompanied by detailed illustrations and scanning electron microscopy (SEM) images are provided for each species. Additionally, partial sequences of the cytochrome c oxidase subunit I (COI) gene for these species, excluding T. tridentata, are presented for molecular characterization.

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