Cockroach homologs of praying mantis peripheral auditory system components.
Cockroach homologs of praying mantis peripheral auditory system components.
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螳螂外周听觉系统组件的蟑螂同源物。
DOI：
10.1002/jmor.10343
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Yager,DavidD
中科院分区：
文献类型：
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作者：
Yager,DavidD
这项研究鉴定了无耳蟑螂的表皮后胸结构，这些结构与其姊妹类群螳螂的外周听觉成分同源，并定义了网翅目从无耳到有耳的表皮过渡的性质。螳螂的中线单耳由一个具有复杂壁的听室组成，其中包含鼓室和弦音传导元件。蟑螂的相应区域，在胸骨和基节之间，有许多排列在离散区域中的插座毛和神经 7 弦音器官，与螳螂鼓室器官同源。神经 7 弦音器官附着在侧脑室周膜 (LVp) 的顶端，其形状和总体结构与听室壁相同。高速视频显示，当髋关节向中线移动时，左心室向内侧旋转以刺激窝毛，同时也像三角形铰链一样移动，给予脊索器官最大的进出刺激。从 LVp 和邻近结构形成螳螂听室仅涉及扩大、向中线移动和轻微旋转。几乎所有本体感觉功能都会丧失，这可能构成建造和维护螳螂耳朵的主要成本。与腿部运动的隔离决定了螳螂耳在中线和由表皮旋钮形成的刚性框架中的位置，它保护弦音器官。 J.莫菲尔。 © 2005 Wiley-Liss, Inc.
This study identifies the cuticular metathoracic structures in earless cockroaches that are the homologs to the peripheral auditory components in their sister taxon, praying mantids, and defines the nature of the cuticular transition from earless to eared in the Dictyoptera. The single, midline ear of mantids comprises an auditory chamber with complex walls that contain the tympana and chordotonal transduction elements. The corresponding area in cockroaches, between the furcasternum and coxae, has many socketed hairs arranged in discrete fields and the Nerve 7 chordotonal organ, the homolog of the mantis tympanal organ. The Nerve 7 chordotonal organ attaches at the apex of the lateral ventropleurite (LVp), which has the same shape and general structure as an auditory chamber wall. High‐speed video shows that when the coxa moves toward the midline, the LVp rotates medially to stimulate socketed hairs, and also moves like a triangular hinge giving the chordotonal organ maximal in–out stimulation. Formation of the mantis auditory chamber from the LVp and adjacent structures would involve only enlargement, a shift toward the midline, and a mild rotation. Almost all proprioceptive function would be lost, which may constitute the major cost of building and maintaining the mantis ear. Isolation from leg movement dictates the position of the mantis ear in the midline and the rigid frame, formed by the cuticular knobs, which protects the chordotonal organs. J. Morphol. © 2005 Wiley‐Liss, Inc.