Green E D, Baker C
Department of Veterinary Anatomy, Faculty of Veterinary Science, Medical University of Southern Africa, Medunsa, South Africa.
J S Afr Vet Assoc. 1996 Sep;67(3):128-32.
Ornithonyssus bacoti (Hirst) is an important parasite of rodents. The characteristic shape of the dorsal and sternal shields and gnathosoma used as taxonomic characteristics was confirmed by scanning electron microscopy. The anal plate is distinctly pear-shaped with a pair of adanal setae lateral to the anal valves, a single postanal seta and a distinct dentate cribrum formed by peg-like projections. In the adult mites a peritreme extends anteriorly to the 1st coxa from the spiracle situated laterally between the 3rd and 4th coxa. The peritreme is an open canal protected by an overhanging dorsal ridge and lined with short peg-like aciculae. The gnathosoma includes a pair of pedipalps, a pair of protrusile chelicerae retracted into the hypostoma, and a serrate tritosternum ventrally. A unique feature to the normal setae of the pedipalps is a golf club-shaped seta which is found medially on the palp genu. A distinctive double-bladed 'palpal claw' or apotele is directed medially from the palp tibia. The pincer-like chela consists of a spear-like prong forming the moveable digit and a curved stylus-like fixed digit used to pierce the skin. Each leg ends with a pair of hooked tarsal claws and a pair of lateral comblike pretarsal appendages adjacent to the pulvillus. The pulvillus may be retracted, allowing the pretarsal operculum to function as a 'clasping organ' that enables the mite to clasp the hairs of the host during feeding.
柏氏禽刺螨（赫斯特）是啮齿动物的一种重要寄生虫。通过扫描电子显微镜确认了用作分类特征的背盾和胸盾以及颚体的特征形状。肛板明显呈梨形，在肛瓣外侧有一对肛侧毛，一根肛后毛，以及由钉状突起形成的明显的齿状筛板。在成年螨中，气门沟从位于第三和第四基节之间外侧的气门向前延伸至第一基节。气门沟是一条开放的管道，由突出的背嵴保护，内衬短钉状针。颚体包括一对须肢、一对缩入下咽的可伸出螯肢，以及腹侧的锯齿状第三胸叉。须肢正常刚毛的一个独特特征是在须肢膝节内侧发现的高尔夫球杆状刚毛。一个独特的双刃“须肢爪”或端跗节从须肢胫节向内侧指向。钳状螯由形成可动指的矛状叉和用于刺穿皮肤的弯曲针状固定指组成。每条腿末端有一对钩状跗爪和一对与爪垫相邻的外侧梳状跗节附属物。爪垫可以缩回，使跗节盖充当“扣紧器官”，使螨在进食时能够扣住宿主的毛发。
