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太白蝎蛉消化道形态学与组织学研究
引用本文:刘书宇,花保祯.太白蝎蛉消化道形态学与组织学研究[J].昆虫学报,2009,52(7):808-813.
作者姓名:刘书宇  花保祯
作者单位:西北农林科技大学昆虫研究所,教育部植保资源与病虫害治理重点实验室,陕西杨凌,712100
基金项目:国家自然科学基金项目,科技部科技基础性工作专项 
摘    要:利用光学显微镜和扫描电子显微镜, 在形态学和组织学水平上研究了太白蝎蛉Panorpa obtusa Cheng成虫消化道的结构。结果表明: 蝎蛉消化道由前肠、中肠、和后肠组成。前肠包括咽喉、食道、和前胃, 但没有嗉囊,其中咽喉可分为骨化的前咽和附着扩肌的后咽(咽喉唧筒); 前胃壁很厚,内膜上长有许多排列整齐、紧密的棕色胃刺,司过滤、暂时储存和磨碎食物的功能; 前肠末端有6个贲门瓣伸入中肠。中肠较长且膨大,其肠壁细胞由柱状细胞和再生细胞组成; 肠壁细胞外分别为环肌和纵肌,无胃盲囊,也未观察到围食膜。6根棕红色的马氏管位于中、 后肠分界处。后肠分为不对称的“V”字型回肠、环状结肠、以及膨大透明的直肠, 直肠内壁上有6个交替排列的直肠垫。最后简要讨论了蝎蛉消化道的结构与功能,及其在蝎蛉科昆虫分类中的意义。

关 键 词:长翅目  蝎蛉科  太白蝎蛉  消化道  构造  组织学  

Morphology and histology of the alimentary canal in scorpionfly Panorpa obtusa (Mecoptera: Panorpidae)
LIU Shu-Yu,HUA Bao-Zhen.Morphology and histology of the alimentary canal in scorpionfly Panorpa obtusa (Mecoptera: Panorpidae)[J].Acta Entomologica Sinica,2009,52(7):808-813.
Authors:LIU Shu-Yu  HUA Bao-Zhen
Abstract:The morphology and histology of the alimentary canal in the scorpion fly Panorpa obtusa Cheng were investigated using light and scanning electron microscopy. In an antero-posterior direction, the foregut includes a pharynx, an oesophagus, and a proventriculus, but is devoid of crop. The elongate pharynx is subdivided into the anterior pharynx and the posterior pharynx or pharyngeal pump, which is inserted with dilator muscles. The proventriculus possesses numerous uniform brown proventricular acanthae on the sclerotized intima, performing the functions of filtrating, grinding, and temporarily storing food particles. Six cardiac valves protrude into the midgut. The long midgut is distensible with longitudinal muscles outside circular muscles; the epithelium consists of large columnar and small regenerative cells. There are no gastric caeca and peritrophic membrane. Six long brown Malpighian tubules are located at the junction between the midgut and the hindgut, extending freely into the heamocoel. The hindgut is subdivided into a V-shaped ileum, a loop-shaped colon, and a translucent, distensible rectum where six rectal pads are located alternatively. Finally, the structure and function of the alimentary canal and its significances in Panorpidae taxonomy are briefly discussed.
Keywords:Mecoptera  Panorpidae  Panorpa obtusa  alimentary canal  structure  histology
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