摘要
黑蝉Cryptotympana atrata Fabricius的发声膜依次由上表面、蜡层、横向几丁质纤维层(H-CFL)、纵-横向和纵向纤丝层(V-HFL和VFL)、真皮层、类脂质层、腊层和下表面组成,具有适合于发声功能的结构特性,而明显区别于其他昆虫的一般角质板。上表面为直径约0.28—0.4μm的纤维网状结构,具有保护功能;但其边缘为直径约2.7μm的拱形纤维束和高约4μm的两棘突起的组合结构,具有加固和弹性阻尼功能。下表面是由直径约8μm的纤维束骨架伸延和交织成直径约0.7—1.0μm的纤维网状结构,具有支撑和保护功能。H-CFL通常为28层,而肋间膜逐渐变薄,凹端约为6层,形成适合于长肋阻尼振动的刚-柔结构。长肋加厚段由H-CFL的片层伸延、加密和增厚而成的几丁质体,共腹端形成适合于阻尼振动的弧形“关节”状节构。每条长肋上方的短肋是由两侧间膜的H-CFL,V-HFL和VFL伸延和交织而成的加厚几丁质体,具有阻尼功能的质量块。
In the black cicada Cryptotympana atrata Fabricius, the sounding membrane is composed of upper coat, wax layer, horizontal-chitinous fibrous layer (H-CFL), vertical-horizontal and vertical fibrous layer (V-HFL and VFL), epidermal layer, lipid layer, wax layer and lower coat. Its structural properties are suitable for the function of sounding and obviously different from the general cuticular plate in other insects. The upper coat is a net-shaped structure of fibres about 0.2-0.4 μm in diameter and has protective function, but its edge is a com-posite structure consisting of arched fibre-bundles about 2.7 μm in diameter and microrugaewith depth of about 4 μm, and has a reinforced and elasto-damping function. The lower coat is a net-shaped structure of fibres about 0.7-1.0 μm in diameter extended and interweaved by fibre-bundle skeletons about 8 μm in diameter, and has supporting and protective function. The H-CFL is generally composed of 28 lamellae, but the intercostal membrane is gradually thinned and at the concave end it has about 6 lamellae; it forms a rigid-soft structure suitable for damping vibration of the long ribs. The thickened section in long ribs is a chitinous body extended, concentrated and thickened by lamellae of the H-CFL, and its abdominal end forms a curved 'joint'-shaped structure suitable for damping vibration. The short rib over each long rib is a thickened chitinous body extended and interweaved by the H-CFL, V-HFL and VFL of the intercostal membrane on both sides, and is a mass-piece with damping function.
出处
《昆虫学报》
CAS
CSCD
北大核心
1992年第4期422-427,共6页
Acta Entomologica Sinica
基金
国家自然科学基金
关键词
黑蝉
发声膜
超微结构
声学功能
Cryptotympana atrata Fibricius-sounding membrane-ultrastruc- ture-acoustic function
