• Title/Summary/Keyword: taxonomic characteristics

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The Taxonomic Study on the Genus Amanita in Korea (한국산(韓國産) 광대버섯속(屬)에 대(對)한 분류학적(分類學約) 연구(硏究))

  • Kim, Yang-Sop
    • The Korean Journal of Mycology
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    • v.4 no.1
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    • pp.1-10
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    • 1976
  • For the purpose of investigating the distribution and flora of wild mushrooms in Korea, this study was conducted primarily on the genus Amanita. Through survey of Suweon, Kwangneung, Mt. Chiri, Taegwanryung, Yeongdong district and Mt. Hanta, 25 species of Amanita including 3 unrecorded species were discovered and are described in this paper. The author proposes to group 25 Korean species of Amanita into 3 subgenera according to morphological characteristics by the modern taxonomic system, and also designated the 3 unrecorded species of Amanita including one variety in Korean common name.

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Taxonomic Revision of the genus Chelon (Pisces, Mugilidae) from Korea (한국산 Chelon속 (Pisces, Mugilidae) 어류의 분류학적 재검토)

  • Kim, Yong-Uk;Kim, Jin-Koo
    • Korean Journal of Ichthyology
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    • v.10 no.2
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    • pp.250-259
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    • 1998
  • This study was carried out to reveal the taxonomic status of the two mullets, Chelon affinis and Chelon haematocheilus from Korea by comparison of their morphological characteristics. Chelan affinis, occurred in the southern coastal area, is a distinct species characterized by having a keel on the middorsal line in front of the spinous dorsal fin. However, Chelon haematocheilus, found in the all coastal areas of Korea excluding Cheju island is easily distinguished from the former in having the deep flat head. By comparison of five groups of Chelan haematocheilus, Kunsan group is slightly differed from others in the height of anal fin and caudal peduncle length. Although Chelon affinis is similar with Chelan haematocheilus in the view of meristic characters, they are distinguished from each other in the number of pyloric caeca and lateral line scales.

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Evaluation of taxonomic validity of four species of Acanthamoeba: A. divionensis, A. paradivionensis, A. mauritaniensis, and A. rhysodes, inferred from molecular analyses

  • LIU Hua;MOON Eun-Kyung;YU Hak-Sun;JEONG Hae-Jin;HONG Yeon-Chul;KONG Hyun-Hee;CHUNG Dong-Il
    • Parasites, Hosts and Diseases
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    • v.43 no.1 s.133
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    • pp.7-13
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    • 2005
  • The taxonomy of Acanthamoeba spp., an amphizoic amoeba which causes granulomatous amoebic encephalitis and chronic amoebic keratitis, has been revised many times. The taxonomic validity of some species has yet to be assessed. In this paper, we analyzed the morphological characteristics, nuclear 18s rDNA and mitochondrial 16s rDNA sequences and the Mt DNA RFLP of the type strains of four Acanthamoeba species, which had been previously designated as A. divionensis, A. parasidionensis, A. mauritaniensis, and A. rhysodes. The four isolates revealed characteristic group II morphology. They exhibited 18S rDNA sequence differences of $0.2-1.1\%$ with each other, but more than $2\%$ difference from the other compared reference strains. Four isolates formed a different clade from that of A. castellanii Castellani and the other strains in morphological group lion the phylogenetic tree. In light of these results, A. paradivionensis, A. divionensis, and A. mauritaniensis should be regarded as synonyms for A. rhysodes.

Neofusicoccum ribis Associated with Leaf Blight on Rubber (Hevea brasiliensis) in Peninsular Malaysia

  • Nyaka Ngobisa, A.I.C.;Zainal Abidin, M.A.;Wong, M.Y.;Wan Noordin, M.W.D.
    • The Plant Pathology Journal
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    • v.29 no.1
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    • pp.10-16
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    • 2013
  • Hevea brasiliensis is a natural source of rubber and an important plantation tree species in Malaysia. Leaf blight disease caused by Fusicoccum substantially reduces the growth and performance of H. brasiliensis. The aim of this study was to use a combination of both morphological characteristics and molecular data to clarify the taxonomic position of the fungus associated with leaf blight disease. Fusicoccum species were isolated from infected leaves collected from plantations at 3 widely separated locations - Selangor, Perak, and Johor states - in Peninsular Malaysia in 2010. All the isolates were identified according to their conidial patterns and DNA sequences generated from internal transcribed spacers (ITS1 and ITS2), the 5.8S rRNA, and an unknown locus (BotF15) containing microsatellite repeats. Based on taxonomic and sequence data, Neofusicoccum ribis was identified as the main cause of leaf blight disease in H. brasiliensis in commercial plantations in Malaysia. A pathogenicity trial on detached leaves further confirmed that N. ribis causes leaf blight disease. N. ribis is an important leaf pathogen, and its detection in Malaysia has important implications for future planting of H. brasiliensis.

Taxonomic Study of Amanita Subgenus Lepidella and Three Unrecorded Amanita Species in Korea

  • Kim, Chang Sun;Jo, Jong Won;Kwag, Young-Nam;Kim, Jae-Hyeun;Shrestha, Bhushan;Sung, Gi-Ho;Han, Sang-Kuk
    • Mycobiology
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    • v.41 no.4
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    • pp.183-190
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    • 2013
  • Amanita Pers. is a well-known monophyletic mushroom genus with a broad distribution. However, the diversity of Korean Amanita species has been underestimated, and most taxonomic studies conducted in Korea have only investigated their morphological characteristics. This approach is frequently insufficient for correct identification in fungal classification; therefore, we constructed a phylogeny of Amanita subgen. Lepidella in order to understand the phylogenetic placements of 16 Amanita specimens collected in Korea in 2012. The phylogeny constructed using the sequence data of the internal transcribed spacers and the partial large subunit of ribosomal RNA identified nine Amanita species (A. citrina, A. excelsa var. spissa, A. flavipes, A. fritillaria, A. oberwinklerana, A. pallidorosea, A. rubescens, A. subjunquillea, and A. volvata); of these, A. fritillaria, A. oberwinklerana, and A. pallidorosea are new to Korea.

First Record of the Genus Palorus Mulsant in Korea (Coleoptera: Tenebrionidae: Palorini) (한국 미기록속 Palorus Mulsant (딱정벌레목: 거저리과)의 보고)

  • Hong, Ki-Jeong;Kim, Moosung
    • Korean journal of applied entomology
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    • v.54 no.3
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    • pp.211-215
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    • 2015
  • Two species of the genus Palorus Mulsant of Palorini (Tenebrionidae) are reported for the first time from Korea, P. ratzeburgii (Wissman, 1848) and P. subdepressus (Wollaston, 1864). These species are economically importance as stored product insect pests in the tropical and subtropical countries, and occur in low densities in the rice mills of southern Korea. Adult morphology, taxonomic diagnosis, illustrations of diagnostic characteristics of these species, and a taxonomic key to the 6 species related to plant quarantine inspections in Korea are provided.

Taxonomic review of Cardamine manshurica (Kom.) Nakai (Brassicaceae) (애기황새냉이(배추과)의 분류학적 재검토)

  • Kim, Yoon-Young;Ji, Seong-Jin;Oh, Byoung-Un
    • Korean Journal of Plant Taxonomy
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    • v.45 no.2
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    • pp.136-144
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    • 2015
  • We reviewed the taxonomic identity and morphological characteristics of Cardamine manshurica (Kom.) Nakai based on its original description and type specimens. Cardamine manshurica, with its smaller flowers and siliques and earlier flowering season, is distinguished from the closely related species C. flexuosa With. This species-level difference is additionally supported in a phylogenetic tree constructed using nrDNA ITS sequences. Taken together, we therefore propose that C. manshurica is a distinct species. The scientific name 'Cardamine manshurica (Kom.) Nakai' is accepted.

Ecological Correlates of Flowering Seasons in Korean Angiosperms

  • Kang, Hye-Soon;Jang, Sun-Young
    • Journal of Ecology and Environment
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    • v.29 no.4
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    • pp.353-360
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    • 2006
  • Ecological correlates of flowering times often are examined to infer evolutionary mechanisms for flowering time diversities. We examined ecological characteristic associations such as growth habits and pollination modes with flowering times among 3,037 Korean angiosperms experiencing strong climatic seasonalities. We first examined taxonomic membership effects on flowering times across diverse taxonomic levels. Phylogeny constrained flowering times at all levels down to the genus level. We then analyzed the effects of ecological characteristics using subset data consisting of species randomly selected from each genus to control phylogenetic effects. The commonly observed patterns of early flowering of woody species in temperate regions existed. Spring flowering shrubs and trees, however, both being woody, were involved with biotic and abiotic vectors, respectively. In two herbaceous groups of annuals and perennials, annuals flowered later in the growing season than perennials although both herbs tended to be associated with abiotic vectors when flowering in autumn. These results support our hypothesis that species able to decouple vegetative and reproductive growth flower in spring's dry season, but species with different habits, even when they flower within the same season, are subjected to different selective pressures for efficient pollination.

A taxonomic study of the genus Fimbristylis Vahl (Cyperaceae) in Korea (한국산 하늘지기속(사초과)의 분류학적 연구)

  • KIM, Jonghwan;KIM, Muyeol
    • Korean Journal of Plant Taxonomy
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    • v.48 no.4
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    • pp.301-330
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    • 2018
  • A morphological study of Korean Fimbristylis was conducted in order to clarify the taxonomical position and scientific names among species. It was determined that the anther size and style length are important characteristics for the species-level identification of Fimbristylis. It was confirmed that Fimbristylis ovata (Burm.f.) J. Kern, which is recorded in the literature but which has no sampling specimens in Korea, grows on the grassland on Marado Island. According to this study, the genus Fimbristylis in Korea is classified into a total of 21 taxa, including four sections, nineteen species, and two varieties.

Taxonomic Study on Six Yeast Species Unlisted in the National Species List of Korea

  • Chorong Ahn;Soonok Kim;Changmu Kim
    • The Korean Journal of Mycology
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    • v.51 no.1
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    • pp.7-24
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    • 2023
  • More than five hundreds of yeast species (including 9 variants) encompassing 142 genera and 48 classes of 2 phyla exist in Korea. However, only 173 species have been cataloged in the National Species List of Korea (NSLK), the backbone reference to claim sovereign rights over biological resources, as of December 2021, due to the lack of taxonomic descriptions, although some of these species are extensively used in industry. The present pilot study investigated the taxonomy of strains belonging to the six most widely used or frequently isolated yeast species (Meyeromyma guilliermondii, Saccharomyces cerevisiae, Saccharomycopsis fibuligera, Wickerhamomyces anomalus, Candida tropicalis, and Papiliotrema flavescens) to include these species in the NSLK. Strains with diverse habitats and geographic origins were retrieved from the National Institute of Biological Resources culture collection. These strains clustered in the same clade as the type strains of the designated species according to phylogenetic analysis of the D1/D2 sequences. Moreover, we described the cell morphology and physiological characteristics of representative strains of each species. This study suggests that these six species are indigenous to Korea and can be accordingly listed in the NSLK.