Steinbrecht R A, Müller B
Tissue Cell. 1976;8(4):615-36. doi: 10.1016/0040-8166(76)90035-5.
Sensilla on the antenna of the bed bug, Cimex lectularius, were studied with the scanning and transmission electron microscope. Those which display a tubular body in the dendrite ending are presumed to have a mechanoreceptor function (bristles of type A, flat plate of type B). Bristles of type A1 contain additional dendrites which terminate at the tip of the bristle and may be gustatory receptors. Sensilla with pores in the hair wall are supposed to have an offactory, humidity and/or temperature receptor function (pegs and hairs of types C, D, E). Hairs of type E contain receptors for the alarm pheromones of the bed bug. Special attention has been paid to the pore structures and epicuticular layers of these sensilla. Possible differences in stimulus conduction are discussed between (i) sensilla with a simple wall and pores with pore tubules (types D and E) and (ii) the ribbed pegs (type C), which have a complex wall structure and spoke channels. The immersed cones of type F have a peculiar innervation, which has not been described previously. Two dendrites are held closely together by a third flat dendrite which wraps around them in the region of the outer segment. Coupling structures were found between the central dendrites, and between these and the third enveloping dendrite. Possible functions of this unique innervation are discussed. The dendrites innervating type D are grouped in three to eight bundles by multiple sheaths. The term thecogen cell is introduced to denote the innermost of the three sheath cells of a sensillum (the outer being the tormogen and the trichogen cell) which builds the dendrite sheath during ontogeny. Comparative morphometry revealed type-specific differences in the length and diameter of the dendrites. Some axons were found to lack any glial or perineurial sheath. Microorganisms were observed in the antennal tissue of several animals.
利用扫描电子显微镜和透射电子显微镜对臭虫（温带臭虫）触角上的感器进行了研究。那些在树突末端呈现管状结构的感器被推测具有机械感受器功能（A型刚毛、B型平板）。A1型刚毛含有额外的树突，这些树突在刚毛尖端终止，可能是味觉感受器。毛壁上有孔的感器被认为具有嗅觉、湿度和/或温度感受器功能（C、D、E型栓状感器和毛状感器）。E型毛状感器含有臭虫报警信息素的感受器。已特别关注这些感器的孔结构和表皮层。讨论了以下两类感器在刺激传导方面可能存在的差异：（i）具有简单壁和带孔小管的孔的感器（D型和E型），以及（ii）具有复杂壁结构和辐状通道的带肋栓状感器（C型）。F型深陷的锥形感器具有独特的神经支配，此前尚未有过描述。两根树突由第三根扁平树突紧密连接在一起，第三根扁平树突在外段区域围绕着它们。在中央树突之间以及中央树突与第三根包绕树突之间发现了耦合结构。讨论了这种独特神经支配的可能功能。支配D型感器的树突由多个鞘分成三到八束。引入了鞘源细胞这一术语，以表示感器三个鞘细胞中最里面的那个细胞（外面的是皮细胞和毛原细胞），它在个体发育过程中形成树突鞘。比较形态测量揭示了树突长度和直径的类型特异性差异。发现一些轴突缺乏任何神经胶质或神经束膜鞘。在几只动物的触角组织中观察到了微生物。
