| Project/Area Number |
25400496
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Stratigraphy/Paleontology
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| Research Institution | Shizuoka University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2015: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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| Keywords | 形態形成 / 外骨格 / 接触感知 / 発生遺伝 / 進化形態 / 機能形態 / 知覚 / 進化 |
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| Outline of Final Research Achievements |
Rolling up all the tergites into a ball-like manner, known as volvation, is an effective defensive strategy, which is repeatedly adopted by numbers of arthropod groups over five million years. For effective volvation, an arthropod requires ball-socket interrelationships between tergites, so called coaptative devices. Based on morphological observations of an extant isopod and extinct trilobites, it appeared that coaptative characters accompany mechanosensory setae or these traces. In addition, ball-socket relationship of coaptative devices for distantly situated tergites corresponds to hardened-yet hardened gap caused by phases of exoskeletal shedding during molting. These lines of evidences imply the feedback from perception system adjacent the completion of tergite morphology, and further the exaptative potential on volvation in arthropod body plan.
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