关键词: 中华稻蝗, 消化道, 脊, 齿, 形态学

Abstract:

The microstructure of Oxya chinensis alimentary canal was systematically observed with scanner and scanning electron microscope. The results show that the inner walls of the esophagus consist of longitudinal ridges, with teeth at the front tip. The crop is composed of two parts. The front part has a small bulge, which is formed by V-shape belt and the V-shape ridges on either side of the belt. Teeth are seen only at the front tip of the inner walls. The rear part of the crop has a large bulge, which is composed of lance ridges, fan-shape ridges and irregular ridges. There are teeth on the top part of the ridges. The teeth in the inner walls of the foregut are mainly of single tooth. All the teeth point to the back except the ones on the stomodaeal valves, which point to the front. The front part of the proctodaeum consists of 12 pyloric valves, with teeth on the inner walls. The ileum and colon are composed of six longitudinal ridges, with teeth on the inner walls of the colon. There are teeth on the inner walls of the rectum except the rectal pad. The teeth of the proctodaeum are mainly tufted teeth, all pointing to the back except the ones in the inner walls of the rectum, which point to the attachment ring. A new scheme for zoning of foregut was proposed based on our observation.

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Key words: Oxya chinensis, alimentary canal, ridges, teeth, morphology