Gothe R, Beelitz P, Schöl H
Institute for Comparative Tropical Medicine and Parasitology, University of Munich, Germany.
Exp Appl Acarol. 1991 Jun;11(2-3):99-109. doi: 10.1007/BF01246083.
Scanning-electron-microscopic investigations of Haller's organ in larvae, nymphs I, II, III and IV, and male and female adult Argas (Persicargas) walkerae ticks showed that morphology and structural organization change during postembryonic development. Stage-dependent differences existed regarding setal numbers of the anterior pit as well as formation and reticulation of cuticular projections in the capsule cavity. The anterior pit increased in size in the course of postembryonic development. It contained only seven setae in larvae, one conical, setiform and grooved seta each as well as two porose and fine setae. Nymphs I, II, III and IV adult ticks had equal numbers of setae; however, one additional unilaterally serrate and grooved seta each were present. Setal length increased continuously during postembryonic development and attained maximum values in adult ticks. The capsule consisted of roof and cavity and was located distinctly lateral in larvae, slightly lateral in nymphs I and II, and in all other stages directly on the longitudinal axis of tarsus. The capsule roof showed a reticular structure. The slit-like main aperture was located peripherally and arranged transversally to the longitudinal axis of tarsus I in larvae. Nymphs and adult ticks had a central, circular main aperture. Stage-dependent cuticular projections of varying form protruded into the capsule cavity. Larvae had only single, free-standing projections which ramified slightly and communicated with each other. Projections were more heavily reticulated in nymphs I and II. In nymphs III and IV as well as male and female adult ticks, a long centrally situated tube of reticular appearance was seen, which was supported by a large number of radially organized and interlocking pillars and communicated with the capsule roof. In all tick stages there were always four porose setae present, arranged on the capsule floor.
对幼虫、I期若虫、II期若虫、III期若虫、IV期若虫以及成年雄性和雌性波斯锐缘蜱（Argas (Persicargas) walkerae）的哈勒氏器进行扫描电子显微镜研究表明，胚胎后期发育过程中形态和结构组织会发生变化。在前坑的刚毛数量以及囊腔内表皮突起的形成和网状结构方面存在阶段依赖性差异。胚胎后期发育过程中前坑尺寸增大。幼虫期前坑仅包含7根刚毛，分别为1根圆锥形、刚毛状且有凹槽的刚毛以及2根多孔且细小的刚毛。I期若虫、II期若虫、III期若虫、IV期若虫和成年蜱的刚毛数量相等；然而，各阶段还额外有1根单侧具锯齿且有凹槽的刚毛。胚胎后期发育过程中刚毛长度持续增加，在成年蜱中达到最大值。囊由顶部和腔组成，在幼虫中明显位于侧面，在I期若虫和II期若虫中略偏侧面，在所有其他阶段则直接位于跗节的纵轴上。囊顶部呈现网状结构。幼虫期狭长的主孔位于周边，与跗节I的纵轴横向排列。若虫和成年蜱有一个位于中央的圆形主孔。不同形态的阶段依赖性表皮突起伸入囊腔。幼虫只有单个独立的突起，这些突起稍有分支且相互连通。I期若虫和II期若虫的突起网状结构更密集。在III期若虫、IV期若虫以及成年雄性和雌性蜱中，可见一根位于中央的长形网状管，由大量呈放射状排列且相互连锁的支柱支撑，并与囊顶部连通。在所有蜱阶段，囊底部始终有4根多孔刚毛。
