• Title/Summary/Keyword: chiton

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The Chromosomes of Four Chiton Species ( Polyplacophora ) (다판류 4 종의 염색체)

  • Seungshic Yum;Choe, Byung-Lae
    • The Korean Journal of Malacology
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    • v.12 no.2
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    • pp.133-140
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    • 1996
  • 한국산 다판류 4종의 정소를 재료로 warm drying method를 이용하여 핵형 분석을 실시하였다. 연두군부과 (Ischnochitonidae)에 속하는 북방줄군부(Lepidezona albrechtii)의 염색체, 그리고 한쌍의 차중부염색체로 구성되어 있으며,줄군부(Lepidozona coreanica)의 염색체는 2n=24, 중부 염색체 8쌍, 중부 또는 차중부염색체로 구성되어 있었으며, 크기로는 별도의 염색체군으로 나누어지지 않았다. 따가리과(Mopaliidae)에 속하는 따가리(Placiphorella stimpsoni)의 염색체는 2n=24, n=12, 핵형분석결과 6쌍의 중부염색체, 한쌍의 차단부, 그리고 5쌍의 말단부염색체였으며, 1변과 2번 염색체쌍은 다른 염색체쌍들 보다 월등히 큰 것으로 나타났다. 군부과 (Chitonidae)에 속하는 꼬마군부(Chiton kurodai)의 염색체는 2n=24, n=12,중부염색체 7쌍, 차중부 4쌍, 그리고 한쌍의 차단부염색체였고. 1번 염색체쌍이 크기에 의해 다른 염색체쌍들과 구분되었다. 본 연구의 결과와 과거의 연구 결과를 종합하면, 연두군부 과는 2n=24;따가리과는 2n=12및 24; 군부과는 2n=24및 26의 염색체를 갖고 있는 것으로 요약되며, 군부속 (Ginus Chiton)에서는 속내 종간 숫적 변이가 나타남이 확인되었다.

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Description of Microscopic Morphology of Leptochiton hakodatensis (Mollusca: Polyplacophora)

  • Park, Jina;Lee, Yucheol;Kim, Yukyung;Park, Joong-Ki
    • Animal Systematics, Evolution and Diversity
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    • v.38 no.1
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    • pp.14-19
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    • 2022
  • Leptochiton Gray, 1847 is one of the most ancient chiton groups which includes more than 130 species that occur in cold and deep waters worldwide. Due to their small-sized body, they are often confused as juveniles of other chiton species. Moreover, lack of morphological information makes species identification of this group very challenging. To date, only two Leptochiton species(L. fuliginatus and L. rugatus) have been reported from Korean waters. In this study, we found L. hakodatensis(Thiele, 1909) for the first time in Korea and described microscopic morphological characters of valves (tegmentum sculpture), girdle scale, and radula using a scanning electron microscopy (SEM). Leptochiton hakodatensis is morphologically similar to L. fuliginatus and L. rugatus, but differently characterized by having dorso-ventrally rounded (not carinated) intermediate valves, girdle (perinotum) scales sculptured with 4-7 longitudinal ribs, and bicuspid major lateral teeth of radula. In addition to morphological examination, we determined the partial mitochondrial cytochrome c oxidase subunit I(cox1) as a DNA barcode sequence information. This is the first report that describes microscopic characters (tegmentum of valves, girdle structure, and radula) of L. hakodatensis using a SEM. This study provides a morphological basis for describing Leptochiton species and discovery of a "hidden" species of this genus.

18S Ribosomal DNA Sequences Provide Insight into the Phylogeny of Patellogastropod Limpets (Mollusca: Gastropoda)

  • Yoon, Sook Hee;Kim, Won
    • Molecules and Cells
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    • v.23 no.1
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    • pp.64-71
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    • 2007
  • To investigate the phylogeny of Patellogastropoda, the complete 18S rDNA sequences of nine patellogastropod limpets Cymbula canescens (Gmelin, 1791), Helcion dunkeri (Krauss, 1848), Patella rustica Linnaeus, 1758, Cellana toreuma (Reeve, 1855), Cellana nigrolineata (Reeve, 1854), Nacella magellanica Gmelin, 1791, Nipponacmea concinna (Lischke, 1870), Niveotectura pallida (Gould, 1859), and Lottia dorsuosa Gould, 1859 were determined. These sequences were then analyzed along with the published 18S rDNA sequences of 35 gastropods, one bivalve, and one chiton species. Phylogenetic trees were constructed by maximum parsimony, maximum likelihood, and Bayesian inference. The results of our 18S rDNA sequence analysis strongly support the monophyly of Patellogastropoda and the existence of three subgroups. Of these, two subgroups, the Patelloidea and Acmaeoidea, are closely related, with branching patterns that can be summarized as [(Cymbula + Helcion) + Patella] and [(Nipponacmea + Lottia) + Niveotectura]. The remaining subgroup, Nacelloidea, emerges as basal and paraphyletic, while its genus Cellana is monophyletic. Our analysis also indicates that the Patellogastropoda have a sister relationship with the order Cocculiniformia within the Gastropoda.

The Chiton Fauna (Mollusca: Polyplacophora) of Korea.Part II: Suborder Acanthochitonina (한국산 군부류(연체동물,다판강)의 분류학적 연구:II.탈군부 아목)

  • Hong, Jae-Sang;Bruno dellAngelo;Richard A. van Belle
    • The Korean Journal of Zoology
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    • v.33 no.4
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    • pp.373-395
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    • 1990
  • The shallow-water marine polyplacophorans were studied based on the collections of the Korea Ocean Research and Development lnsdtute made between 1980 and 1983. Eight species of acanthochitonid polyplacophorans (Suborder Acanthochitonina) are now known to occur in Korean waters. lllustrations. descdptions, and complete svnonvmies are provided for each of them. Two species are described as new to science: Acanthochitona byungdoni. n. sp.and Notoplax (Notoplax) kaasi, n. sp..

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The Chiton Fauna (Mollusca: Polyplacophora) of Korea, Part I: Suborder Lepidopleurina and Ischnochitonina (한국산 군부류(연체동물 문, 다판 강)의 분류학적 연구 I. 아기군부 및 연두군무 아목)

  • dell' ANGELO , Bruno;;Van
    • Animal Systematics, Evolution and Diversity
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    • v.6 no.1
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    • pp.29-56
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    • 1990
  • In the course of the study program of benthic invertebrates of the coastal shelves of Korean Peninsula, the shallow -water chitons (Mollusca : Polyplacophora) are studied based on the collections of the Korea Ocean Research and Development Insitute made between 1980 and 1983. A total of sixteen species belonging to the Orders Lepidopleurina and Ischnochitonina , are now recognized from Korean waters,of which the following two species are newly recorded ; Leptochiton (Leptochiton ) rugatus (Carpenter in Pilsbry), and Mopalia schrencki Thiele. Illustrations, description and complte synonymies are provided for each of them.

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First Record of Callochiton foveolatus (Polyplacophora: Callochitonidae) from Korea

  • Shin, Youngheon;Lee, Yucheol;Park, Joong-Ki
    • Animal Systematics, Evolution and Diversity
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    • v.34 no.1
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    • pp.64-68
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    • 2018
  • The genus Callochiton Gray, 1847 is small to medium sized chiton (up to $55{\times}36mm$ in size) and includes approximately 30 species worldwide, most of which are found on hard substrata in subtidal zone. To date, only three species of Callochiton Gray, 1847 have been reported in Japan. In this study, we found C. foveolatus(Is. Taki, 1938) as first record of the family Callochitonidae Plate, 1901 in Korea and its morphological features were described and compared with other northwestern Pacific species. In addition, the partial fragment of mitochondrial DNA cytochrome c oxidase subunit I sequences of C. foveolatus was determined as DNA barcoding record and compared with other congeneric species.

Leptoplax doederleini (Polyplacophora: Acanthochitonidae) from South Korea

  • Shin, Youngheon;Park, Jina;Lee, Yucheol;Kim, Taeho;Park, Joong-Ki
    • Animal Systematics, Evolution and Diversity
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    • v.35 no.1
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    • pp.10-14
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    • 2019
  • Acanthochitonidae Pilsbry, 1893 is one of the chiton families characterized by 9 pairs of sutural tufts on a well-expanded girdle that overgrows plates. It is found in intertidal and subtidal zones worldwide. Of its eight genera, only two have been previously reported in South Korea: Acanthochitona Gray, 1821 and Notoplax H. Adams, 1862. Here we report Leptoplax doederleini (Thiele, 1909) as the first record of the genus Leptoplax in South Korea and describe and compare its morphological features with N. kaasi Hong, Dell'Angelo and Van Belle, 1990. In addition, we provide the partial sequence of the mitochondrial DNA cytochrome c oxidase subunit I gene as a DNA barcode sequence record.

Isolation of Agar Degrading Bacteria, Cytophaga sp. ACLJ-18 and Optimization of Enzyme Production (한천 분해균 Cytophage sp. ACLJ-18의 분리 및 효소 생산 조건 최적화)

  • 조순영;주동식
    • KSBB Journal
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    • v.11 no.5
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    • pp.593-599
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    • 1996
  • The strain which produces agar degrading enzyme was isolated from chiton(Liolophura japonica). The strain was identified as Cytophaga sp. through its morphological, physiological, and biological characteristics. For the production of agar degrading enzyme, 0.3% nutrient broth, 0.2% yeast extract and 0.5% agar was used as nitrogen and carbon source, respectively. The optimal initial pH, NaCl and temperature for the agar degrading activity of Cytophaga sp. were 7.0, 2.0% and $30{\pm}2^{\circ}C$, respectively. Agar degrading activity of enzyme obtained from Cytophaga sp. was increased until the incubation of 96hrs, but after 96hrs, the activity was decreased.

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A Study on the Dance Costume of Greece (그리이스 무용 형식에 관한 연구)

  • 임상임
    • Journal of the Korean Home Economics Association
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    • v.36 no.10
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    • pp.119-130
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    • 1998
  • This is on the dance costume of ancient Greece. The present study classified the characteristics of Greek dance and dance costume according to the silhouette, quality of material, color and ornaments. Materials of the study are the pictures and figures presented in literatures, sculptures, crockeries, murals, coins. The dances of Greece can be classified into religious dance, educational dance, recreational dance, dramatic dance and various forms of dance on each dances were developed. Especially, it is the greatest character that Greeks gave dances educational value and created composit art including song, lines and dance. As dance costume, Himation, Chiton, Chlamys which Greeks generally wore were widely worn. Also, the beauty of dance costume was maximized by the changes of basic costumes and development of various ways of wearing. Especially, professional dancers wore costumes shorter than knee-length ones forming a A-line silhouette different from a cylindrical one. Thin cloth revealing body silhouette such as fiax hemp, linen, silk were used as materials of dance costumes. As for colors, white was mainly used, But orange, blue and green were used, too. They wore band, scarf, bonnet on the head and seldom used any ornaments except for fibula. They wore the same sandals which Greeks wore, Crepis, front-heeled shoes which is thought to be the origin of modern ballet shoes for the technique of toe in dance. As mentioned above, as the dance costume of Greece were mainly worn as the similar forms of the dance costume of Greeks, various forms of costumes were worn with the development of dance and bold ways of wearing and silhouette were developed unlike the costume of common people.

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A Study on the Flat Method of Formative Design for Clothing Based on the Principles of Origami - Focusing on Analysis of the Original Forms of the Ancient Clothing - (오리가미 원리에 기반한 평면에서의 의복 조형 디자인 연구 - 고대 복식 원형에 대한 분석을 중심으로 -)

  • Lim, So-Yon;Lee, Joo-Hyeon
    • Journal of the Korea Fashion and Costume Design Association
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    • v.14 no.1
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    • pp.1-11
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    • 2012
  • The Original forms of the ancient clothing have been evolved in various designs and showed each unique formativeness based on the basic principles of origami. The purpose of this study was to analyze the basic clothing formativeness in the original forms of the ancient clothing based on the principles of origami. The methods of this study were to identify significant relevant ancient clothing figures with each unique formativeness based on the principles of origami and analyze the formativeness characters and values through comprehensive literature reviews on topic-related books and theses on a foundation of triangulation of observer. The results were as follows: The significant ancient clothing figures with principles of origami were identified as kalasiris, chiton, chlamys, toga, dalmatica, paludamentium, and lorum. The formative principles applied in the ancient clothing figures were identified as exaggerated measurements, folding and unfolding, bending, and angle. And the formative characters and values were identified as potential drape realization, potential silhouette realization, potential three-dimensional design optimality, and potential three-dimensional formativeness realization. The result of this study may be used for a newer approach for the fundamental digging of clothing formativeness in advance.

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