• 제목/요약/키워드: elytra

검색결과 21건 처리시간 0.041초

딱정벌레목 곤충의 날갯짓에 대한 실험적 연구 (Experimental Study on Flapping of a Coleoptera)

  • 유용훈;장두환;박훈철;변영환;변도영
    • 한국항공우주학회지
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    • 제36권1호
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    • pp.1-6
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    • 2008
  • 본 연구에서는 딱정벌레목 곤충의 비행특성을 알아보기 위해 유동가시화가 수행되었고, 겉날개의 날갯짓의 영향에 대해 고찰하였다. 또한 고속 카메라를 이용하여 겉날개와 속날개의 움직임을 분석하였다. 실험 결과 날갯짓 하는 곤충의 세 가지 양력발생 원리를 확인할 수 있었다. 그리고 겉날개의 미세한 날갯짓을 확인할 수 있었으며, 겉날개의 효과를 예상할 수 있었다.

Experimental and Computational Investigation of Aerodynamic Characteristics of Hovering Coleoptera

  • Saputra, Saputra;Byun, Do-Young;Yoo, Yong-Hoon;Park, Hoon-Choel;Byun, Yong-Hwan
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2007년도 춘계학술대회A
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    • pp.384-388
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    • 2007
  • Aerodynamic characteristics of Coleoptera species of Epilachna quadricollis and Allomyrina dichotoma are experimentally and numerically investigated. Using digital high speed camera and smoke wire technique, we visualized the continuous wing kinematics and the flight motion of free-flying coleoptera. The experimental visualization shows that the elytra flapped concurrently with the main wing both in the downstroke and upstroke motions. The wing motion of Epilachna quadricollis was captured and analyzed frame by frame to identify the kinematics of the wings and to implement it in the movement of a model wing (thin plate) in the simulation. The two-dimensional simulation of Epilachna quadricollis hovering flight was performed by assuming the wing cross section shape as a thin plate, even though most of insect's wings are made of curved corrugated membrane. The effect of Reynolds number are investigated by the simulation. Meanwhile, in order to investigate the role and effect of elytra, the flow visualization of Allomyrina dichotoma was carried on using smoke wire visualization technique. Here, we confirmed that the vortex generated by elytra due to its movement is strongly influence the vortex dynamic generated by hind wings.

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Additional Records of the Hydrothermal Vent Scale Worm Branchinotogluma segonzaci (Polynoidae: Lepidonotopodinae) from the North Fiji Basin and Tonga Arc

  • Lee, Won-Kyung;Lee, Geon Hyeok;Ju, Se-Jong;Kim, Se-Joo
    • Animal Systematics, Evolution and Diversity
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    • 제37권4호
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    • pp.273-279
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    • 2021
  • Branchinotogluma segonzaci (Miura and Desbruyères, 1995) occurs in hydrothermal vent fields of the southwestern Pacific Ocean. We morphologically compared B. segonzaci from the North Fiji Basin with the original description from the Lau Basin and a subsequent study of specimens from the Manus Basin. The main characteristics of all B. segonzaci populations were similar having 21 segments, 10 pairs of elytra, cylindrical-shaped anterior lobes, and ventral papillae on segment 12 and ventral lamellae on segments 13-17 in males. However, the specimens from the North Fiji Basin had rounded to sub-renifrom elytra rather than oval in the original description. Additionally, we newly obtained 11 cytochrome oxidase subunit I (COI) DNA barcodes from the North Fiji Basin and Tonga Arc populations and compared them with known COI DNA barcodes of Branchinotogluma species. Thirteen sequences of B. segonzaci showed 0.0-1.07% intraspecific variation and formed two clades in the COI neighbor-joining tree, whereas the interspecific variation among Branchinotogluma species was 8.19-22.4%. The results of this study contribute to biogeographic studies of B. segonzaci and the evolution of polynoid scale worms in chemosynthesis-based ecosystems.

Amplified Fragment Length Polymorphism (AFLP)을 이용한 무당벌레(Harmonia axyridis : Coccinellidae)의 초시색상패턴의 변이 분석 (Differentiation of Elytra Color Patterns in Multicolored Asian Ladybird Beetle, Harmonia axyridis (Coleoptera; Coccinellidae), using AFLP analyses)

  • 박초롱;김정희;유용만;윤영남
    • 한국응용곤충학회지
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    • 제55권3호
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    • pp.245-256
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    • 2016
  • 무당벌레(Harmonia axyridis)는 종내에서 초시색상패턴이 매우 다양하게 존재한다. 본 논문에서는 서로 다른 색상패턴의 무당벌레를 대상으로 amplified fragment length polymorphism (AFLP)을 실시하여 무당벌레의 초시색상 패턴간 유전형질의 차이를 확인하고자 하였다. 총 28 개의 프라이머 조합으로 실험을 실시한 결과, 총 2,741 개의 밴드가 검출되었다. 그 중 20 개의 밴드(S1-S20)만이 특정 색상패턴에서 나타났다. 이들 가운데 9 개의 밴드를 색상에 연관된 AFLP 후보 지표로 선발하였다. 밴드 가운데 S1과 S2, S20은 Succinea 1, 2 변이형에 공통적으로 나타났으며, S3와 S5는 Conspicua 변이형에 특이적이었다. 또한 S13는 Spectabilis 변이형에, S15와 S18, S19는 Succinea 2 변이형에 특이적이었다. 특정 색상패턴에만 나타나는 9 개의 AFLP 지표들은 cloning을 통해 염기서열 분석을 실시하였고, GenBank를 이용해 다른 염기 서열과 비교를 해보았지만 아무런 상동성도 찾을 수가 없었다. 무당벌레 종 내 유전적 다양성을 평가한 결과, Spectabilis가 Conspicua보다 Succinea 변이형에 높은 유사성을 보였다. 색상에 연관된 AFLP 후보 지표를 기준으로 sequence characterized amplified region (SCAR) 지표로 변환하여 9 개의 AFLP 분자지표들 가운데에서 5 개만이 SCAR 지표로 전환될 수 있었으며, 이를 통해 AFLP 지표가 무당벌레의 색상과 연관되어 있는지 확인할 수 있었다.

Two Omaliine Species (Coleoptera: Staphylinidae) New to Korea

  • Kim, Tae-Kyu;Ahn, Kee-Jeong
    • Animal Systematics, Evolution and Diversity
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    • 제30권2호
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    • pp.151-157
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    • 2014
  • A taxonomic study of two omaliine genera Acruliopsis Zerche and Omalium Gravenhorst in Korea is presented. Two species (Acruliopsis ussuriensis Zerche and Omalium japonicum Sharp) are reported for the first time in Korea. Diagnoses of those two genera with redescriptions of the species are presented. Acruliopsis ussuriensis is distinguished by more or less short elytra, a pair of conspicuous processes on male sternite VII and emargination of outer lateral margin of paramere at base. Omalium japonicum is distinguished by brown elytra and structure of aedeagus with swollen median lobe and expanded paramere. Habitus photographs and illustrations of diagnostic characters are provided.

Additional Description of the Vent Scale Worm Thermopolynoe branchiata (Polychaeta: Polynoidae) from the North Fiji Basin

  • Won-Kyung Lee;Geon Hyeok Lee;Se-Jong Ju;Se-Joo Kim
    • Animal Systematics, Evolution and Diversity
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    • 제39권1호
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    • pp.47-52
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    • 2023
  • Thermopolynoe Miura, 1994 is a monotypic genus in Lepidonotopodinae that comprises species endemic to chemosynthesis-based ecosystems. Here, we examined T. branchiata collected from the hydrothermal vents in the North Fiji Basin. For the first time in Thermopolynoe, we report sexual dimorphism detecting nephridial papillae on segments 11-13 in males, additionally describe the morphology on elytra with round to conical microtubercles on the surface, and distinguish presence of small neuropodial lobes on segments 3-26. We also revised couple of errors and ambiguities in the original description: incongruence between the description and figure and existence of individual variation in ratio of tentacular cirri and palps. In addition, three COI sequences of T. branchiata specimens from the North Fiji Basin were newly obtained and sequences divergence with other Lepidonotopodinae species were determined. These results would contribute to the taxonomy of polynoids in a chemosynthesis-based ecosystem.

환경요인이 무당벌레(Harmonia axyridis)의 초시무늬 변이에 미치는 영향 (Effects of Environmental factors on Elytra Colored Patterns of Multicolored Asian Lady Beetles, Harmonia axyridis (Coleoptera: Coccinellidae))

  • 강은진;조창욱;박초롱;윤규식;강민아;권혜리;서미자;유용만;윤영남
    • 한국응용곤충학회지
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    • 제48권4호
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    • pp.459-466
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    • 2009
  • 지리적 환경적으로 다른 두 지역에서 채집한 무당벌레(Harmonia axyridis)의 월동개체군에 있어, 평균기온이 높고 일조시간이 상대적으로 긴 지역에서 멜라닌 계통의 색상패턴이 발현율이 다소 높게 나타나는 것을 확인하였으며, 같은 지역에서 계절적 차이에 따른 무당벌레의 색상패턴별 발생양상 또한 유충시기를 평균기온과 일조시간이 긴 시기에 노출되었던 개체군에서 멜라닌 계통의 색상패턴 발현율이 높게 나타나, 온도나 일조량과 같은 환경조건이 무당벌레의 색상패턴형성에 있어 영향을 미칠 수 있음을 확인하였다.

Notes on Three Species of the Laboulbeniales Newly Collected in Korea (2005)

  • Lee, Yong-Bo;Na, Young-Hee;Lim, Chae-Kyu
    • Mycobiology
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    • 제33권1호
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    • pp.61-64
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    • 2005
  • Three species of the Laboubeniales from Korea are described. They are new to the mycological flora of Korea. Corethromyces purpurascens on several parts of Ochthephilum densipenne, Laboulbenia barbara on the metasternum of Philonthus longicornis and L. compressa on the elytra of Harpalus tinctulus were found.