Backus Elaine A, McLean Donald L
Department of Entomology, University of California, Davis, California 95616.
J Morphol. 1982 Jun;172(3):361-379. doi: 10.1002/jmor.1051720310.
The ultrastructure of the sensilla, and other structures, within the stylets and precibarium of Macrosteles fascifrons were examined by transmission and scanning electron microscopy. Precibarium is a new term, defined here, for the canal that precedes the cibarium inside the leafhopper head. Within the precibarium are found 20 chemosensilla and a previously undescribed structure, the precibarial valve. Twelve mechanosensilla, three in each stylet, are found within the maxillary and mandibular stylets. The relationship between all of these structures and feeding by the insect is detailed in a feeding mechanism hypothesis. It is concluded that leafhoppers (and probably all homopterans) utilize the precibarial chemosensilla alone for gustatory discrimination, the stylet sensilla for proprioception, and the precibarial valve for regulation of fluid uptake and compartmentalization of the sensilla.
利用透射电子显微镜和扫描电子显微镜对束短头叶蝉（Macrosteles fascifrons）口针和前食窦内的感器及其他结构的超微结构进行了研究。前食窦是一个新术语，在此定义为叶蝉头部内食窦之前的通道。在前食窦内发现了20个化学感器和一个以前未描述过的结构，即前食窦瓣。在上颚和下颚口针内发现了12个机械感器，每个口针中有3个。在一个取食机制假说中详细阐述了所有这些结构与昆虫取食之间的关系。得出的结论是，叶蝉（可能所有同翅目昆虫）仅利用前食窦化学感器进行味觉辨别，利用口针感器进行本体感觉，利用前食窦瓣调节液体摄取并对感器进行分隔。
