• 제목/요약/키워드: Gastrotricha

검색결과 13건 처리시간 0.026초

Description of Two New Thaumastodermatids (Gastrotricha, Macrodasyida) from Korea

  • 장영천;이지민
    • Animal cells and systems
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    • 제2권3호
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    • pp.315-321
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    • 1998
  • Two new marine gastrotrichs of the family Thaumastodermatidae are described from South Korea. Tetranchyroderma gracilium n. sp. bears pestle organs, tetrancres, and two pairs of large dorsolateral tubes. It seems most closely related to T. massiliense Swedmark, T. heterotubulatum Hummon, Todaro and Tongiorgi, and T. boreale Clausen. Thaumastoderma copiophorum n. sp. has five pairs of dorsal cirrata, the overall picture of which differs clearly from that of all known species. In the presence of accessory cirrata, it relates to T. appendiculatum Chang, Lee and Clausen.

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Marine Gastrotrichs of the Genus Diplodasys (Macrodasyida: Thaumastodermatidae) from Korea

  • Lee, Ji-Min;Chang, Cheon-Young
    • Animal Systematics, Evolution and Diversity
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    • 제22권1호
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    • pp.109-115
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    • 2006
  • Two marine gastrotrich species are reported from sublittoral sand bottom of Korea: Diplodasys ankeli Wilke, 1954 and D. meloriae Todaro, Balsamo and Tongiorgi, 1992. Both species are redescribed in detail, with the discussion on the intraspecific variability between Korean specimens and the original description or among Korean specimens. The genus Diplodasys is newly recorded from Korea as well as the Northwest Pacific.

Pseudostomella Gastrotrichs (Macrodasyida, Thaumastodermatidae) from South Korea, with o Brief Review of the Genus

  • Lee, Ji-Min;Chang, Cheon-Young
    • Animal cells and systems
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    • 제6권3호
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    • pp.207-213
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    • 2002
  • Two new marine gastrotrichs of the genus Pseudostomella, P. longifurca and P. koreana, are described from the shallow sublittoral sand bottoms of South Korea. Pseudostomella longifurca n. sp. is characterized by the cuticular armature with tetrancres, five dorsal papillae on the prebuccal apparatus, four dorsolateral adhesive tubes, and elongated pedicle. Pseudostomella koreana n. sp. is distinguished from its congeners by the small body, tetrancres, two pairs of dorsolateral adhesive tubes, and tube-shaped copulatory organ. A brief review of the genus is prepared, with the character comparison table for all congeners currently recognized, and a revised key to the species of Pseudostomella. This is the first record of the genus Pseudostomella from East Asia.

Dendrodasys duplus, a New Gastrotrich Species (Macrodasyida: Dactylopodolidae) from South Korea

  • Lee, Jimin;Chang, Cheon Young;Kim, Dongsung
    • Animal Systematics, Evolution and Diversity
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    • 제30권2호
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    • pp.103-107
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    • 2014
  • A new gastrotrich species of the genus Dendrodasys (Dactylopodolidae) is described on the basis of specimens collected from sublittoral fine sandy bottoms at Uljin, East Sea and at Gujwa, the northeastern coast of Jeju Island, South Korea. Dendrodasys duplus is characterized by a triangular head with lateral lobes extending outward, two pairs of pestle organs posterior to the lateral cephalic lobes, a pair of anterior adhesive tubes, the absence of dorsal, lateral and ventral adhesive tubes, large posterior adhesive tubes arising from the anterior third of the caudal peduncle, and paired testes of different lengths. The genus Dendrodasys is recorded for the first time in East Asia.

한국 담수산 복모류 Chaetonotidae과의 분류 (Freshwater Chaetonotid Gastrotrichs in Korea)

  • 이지민;장천영
    • Animal Systematics, Evolution and Diversity
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    • 제16권1호
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    • pp.87-104
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    • 2000
  • 1994년 5월부터 남한의 다향한 담수역 65개 지점에서 채집한 표본들을 관찰한 결과 모두 10종의 담수산 복모류를 동정하였다.: Polymerurus rhomboides(Stokes), P. nodicaudus(Voigt), Lepidodermella squamata (Dujardin), Chaetonotus(Zonochaeta) succinctus Voigt, C. (Z.) bisacer Greuter, C. (Euchaetonotus) polyspinosus Greuter, C. (E.) heterospinosus Balsamo, C. (E.) heideri Brehm, C. (E.) zelinkai Grunspan, and C.(Hystricochaetonotus) persetosus Zelinka. 저자들은 이들을 재기재하고 도판과 검색표를 작성하였다. 본 연구는 한국 담수산 복모류에 관한 최초의 기록이다.

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Crasiella clauseni, a New Gastrotrich Species (Macrodasyida, Planodasyidae) from Jeju Island, South Korea

  • Lee, Ji-Min;Chang, Cheon-Young
    • Animal Systematics, Evolution and Diversity
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    • 제28권1호
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    • pp.42-47
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    • 2012
  • A new gastrotrich species of the genus Crasiella (Planodasyidae) is described from the sublittoral sandy bottom of Jeju Island, South Korea. The family Planodasyidae and the genus Crasiella are recorded for the first time from East Asia. Crasiella clauseni n. sp. differs from its congeneric species by the combination of characters: absence of cephalic sensory pits; unseparated arrangement of anterior tubes and ventrolateral tubes, comprising about 120 adhesive tubes along whole body length; 5-7 horizontal rows of adhesive tubes and a pair of TbV in the anterior part of pharyngeal region; bifid pedicles with 8-11 posterior adhesive tubes; and tube-shaped seminal receptacle and copulatory organ. This paper deals with description of the new species, and provides a key to the species of genus Crasiella.

Reconsideration on Two Acanthodasys Species (Gastrotricha: Macrodasyida: Thaumastodermatidae) from Korea, with Nomenclatural Note on Korean Marine Gastrotrichs

  • Lee, Jimin;Chang, Cheon Young
    • Animal Systematics, Evolution and Diversity
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    • 제33권1호
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    • pp.17-25
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    • 2017
  • Two marine gastrotrich species of the genus Acanthodasys, A. ericinus Lee, 2012 and A. comtus Lee, 2012, are taxonomically reconsidered. Both of them were originally described based on the specimens from intertidal or sublittoral sandy bottom of the Yellow Sea and Jeju Island, South Korea, and included in a monographical publication of in 2012. However, the description of them was quite insufficient, and designations of type specimens were entirely lacking. In this study, we make a subsequent designation of type specimens for the two Acanthodasys species, and carry out a full redescription of them with additional remarks on their morphological micro-characteristics by scanning electronic microscopy. Some brief nomenclatural notes on Korean marine gastrotrichs are also provided.

A New Gastrotrich Species of the Genus Ptychostomella (Macrodasyida, Thaumastodermatidae) from South Korea

  • Lee, Ji-Min;Hwang, Ui-Wook;Chang, Cheon-Young
    • Animal cells and systems
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    • 제13권1호
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    • pp.25-30
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    • 2009
  • A new marine gastrotrich species, Ptychostomella jejuensis n. sp. belonging to the family Thaumastodermatidae, is described on the basis of the specimens from subtidal sand bottom at about 6-7 m depth of Jeju Island, South Korea. Ptychostomella jejuensis n. sp. is distinguished from its congeneric species with smooth cuticular armature by the character combination: (1) small body up to about 160 ${\mu}m$ in length; (2) presence of knob-like cephalic tentacles; (3) absence of dorsal and ventral adhesive tubes; (4) bifid pedicles; (5) pyriform copulatory organ. Under scanning electron microscopy, numerous epidermal gland openings were observed in the new species, characteristically flanking a bristle. Taxonomic accounts on the affinities, some brief remarks on the epidermal gland openings and the cooccurrence with P. orientalis Lee and Chang, 2003 are also presented with detailed illustrations and scanning electron photomicrographs.