(Nichols) is indigenous to Hunan province, China. This species is currently listed as endangered however little is known about its biology. To address this, we in captivity and used the offspring to document the morphology of the digestive system by light microscopy observation of tissue sections. The digestive system consisted of the digestive tract, which was composed of mouth, pharynx, esophagus, and intestine, and stomach, 2 pairs of barbels, 5 types of pharyngeal teeth (typically 5•4•2/2•4•5), and 42–55+ 45–66 lateral line scales. The intestine was extremely and twisted 42±5 times. The ratio of intestine length to body length was 21.42±3.51, and that of hepatopancreas weight to total weight was 1.21±0.15.scratches food with its lip. , submucosa, serosa layersThe thickness of each layer differed among the segments of the digestive system. The thickness of the submucosa differed significantly between the foregut, midgut, and hindgut (<0.01). Similarly, the thickness of the longitudinal muscle differed between the foregut, midgut, and hindgut (<0.05). The submucosa and circular muscle were thicker in the e Similarly, the mucosal and submucosal thickness was greater in the plica than in the hindgut. 44±6 wrinkles, and the number of wrinkles decreased from the foregut to the hindgut. ). The density of mucous cells was higher in the plica of the prepharynx than in the goblet cells of the intestine, and higher in the foregut than in the hindgut. The density of mucous cells differed between the plica in different regions of the gut and decreased from the base to the head of the plica in the esophagus and hindgut. Similarly, the density of mucous cells differed between the plica of the foregut, midgut, and hindgut. The density in the head of the plica tended to decrease between the foregut and hindgut. Food was absorbed in both the esophagus and the intestine a long and high density of mucous cells.