• Title/Summary/Keyword: Polyplacophora

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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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A Catalogue of Molluscan Fauna In Korea (한국산 연체동물 목록)

  • Lee, Jun-Sang;Min, Duk-Ki
    • The Korean Journal of Malacology
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    • v.18 no.2
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    • pp.93-217
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    • 2002
  • Molluscan specimens collected in the whole country of Korea during the from 1994 through 2002, were identified and classified. A total of 1,560 molluscan species were listed in this study; one species in class Aplacophora, 18 species in class Polyplacophora, 1,038 species in class Gastropoda, 467 species in class Bivalvia, 14 species in class Scaphopoda and 22 species in class Cephalopoda. Among the identified species, 360 species (three species in class Polyplacophora, 266 species in class Gastropoda, 85 species in class Bivalvia, 6 species in class Scaphopoda) are newly recorded to Korean fauna.

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Karyotypes of Four Acanthochitona Species (Acanthochitonidae, Polyplacophora) in Korea (한국산 가시군부속 ( 가시군부과 : 다판강 ) 4종의 핵형)

  • Park, Boon-Jo;Lee, In-Sook;Seungshic Yum;Choe, Byung-Lae
    • The Korean Journal of Malacology
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    • v.14 no.1
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    • pp.27-32
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    • 1998
  • 한국산 가시군부속 (Acanthochitona)의 좀털군부(A. achates),참털군부 (A. circellata), 털군부(A.defilippii)및 애기털군부(A. rubrolineata)등 4종의 정소를 재료로 warm drying mithod를 통해 염색체를 관찰하였다. 염색체의 수는 4종 모두 2n=16, n=8로 확인되었다. 핵형분석결과 형태적으로 좀털군부는 다섯 쌍의 중부염색체, 한쌍의 차중부염색체, 두 쌍의 차단부염색체로;참털군부는 한쌍의 중부염색체, 네 쌍의 차중부염색체, 두 쌍의 차단부염색체, 한 쌍의 말단부염색체로; 털군부는 세 쌍의 중부염색체, 세 쌍의 중부염색체, 한 쌍의 차중부염색체, 한 쌍의 차중부 또는 차단부염색체로 구성되어 있었다. 외부 형태적으로 매우 유사한 애기털군부와 좀털군부의 경우, 특히 4번 염색체에서 현저한 형태적 차이를 보였다. 8번 염색체의 경우, 애기털군부와 좀털군부는 중부염색체인 반면 참털군부와 털군부는 말단부염색체로 나타났다. 동북아시아와 유럽에 분포하는 가시군부류 사이에 나타나는 염색체의 속내 종간 숫적변이를 보면 동북아시아산(2n=16)이 유럽산(2n=16)이 유럽산(2n=24, 18)보다 분화된 것으로 보인다.

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Karyotypes of Two Ischnochiton Species ( Ischnochitonidae : Polyplacophora (연두군부 속 ( 다판강 : 연두군부과 ) 에 속하는 두 종의 핵형)

  • Choe, Byung-Lae;Park, Boon-Jo;Song, Jun-Im;Seungshic Yum
    • The Korean Journal of Malacology
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    • v.11 no.1
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    • pp.62-69
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    • 1995
  • 연두순부(Ischnochiton comptus)와 가는 줄연두군부(I. hakodadensis)두 종의 정소를 재료로하여 핵형 분석을 실시하였다. 두 종의 염색체는 모두 중부염색체로 구성되어 있고, 염색체 수는 n=12이며, 성염색체는 관찰되지 않았다. 이들 염색체는 이들의 크기로는 별도의 염색체군으로 나누어지지 않았다.

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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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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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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.

First Record of Deshayesiella curvata (Polyplacophora: Protochitonidae) from Korea

  • Shin, Youngheon;Lee, Yucheol;Park, Joong-Ki
    • Animal Systematics, Evolution and Diversity
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    • v.34 no.4
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    • pp.215-219
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    • 2018
  • Protochitonidae Ashby, 1925 is a family of small to medium sized chitons that includes a single fossil genus and two extant genera. Of the two extant genera, Deshayesiella Carpenter in Dall, 1879 contains 5 described species. Although most Deshayesiella species are known to be found in deep sea habitats(over 100 m), D. curvata (Carpenter in Pilsbry, 1892) is found from shallow waters(1-20 m). In this study, we provide details of microstructure of shell and radula characters using scanning electron microscopy and morphological features of D. curvata, and its partial sequence of mitochondrial DNA cox1 gene as DNA barcode sequence. In addition, we compare morphological differences of D. curvata from 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.

A Catalogue of the Mollusks of Jeju Island, South Korea

  • Noseworthy, Ronald G.;Lim, Na-Rae;Choi, Kwang-Sik
    • The Korean Journal of Malacology
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    • v.23 no.1
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    • pp.65-104
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    • 2007
  • This catalogue is the result of a four-year survey of the mollusks of Jeju Island, the southernmost island in the Republic of Korea. Forty-eight survey stations were visited, with a total of 82 specific localities being sampled. Literature records were also obtained. Local and world distribution of each species is included. This survey reports a total of 1,072 mollusk species and subspecies; 1,015 marine and 57 land and freshwater. There are 812 gastropods, of which 755 are either entirely marine or have marine affinities. The best represented of the marine families are the Pyramidellidae, Trochidae, and Ovulidae. There are 225 bivalves, none being freshwater species, with the Veneridae, Mytilidae, and Arcidae having the largest number of species. Among the smaller classes there are sixteen Cephalopoda, eleven Polyplacophora, and eight Scaphopoda. Compared to mainland Korea, Jeju Island has a rather small terrestrial mollusk fauna and a depauperate freshwater one, with mainly Palearctic connections. The Helixarionidae and Bradybaenidae are the largest terrestrial families. The marine faunal affinities with the neighboring Japonic and Indo-West Pacific provinces are also discussed, revealing that this island's mollusk fauna is a blend of warm-temperate and subtropical-tropical species.

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