Gymnospermaceae

Body length, cylindrical body, flat abdomen. The head is low, and the kiss end is flat and thin; The lateral fins are wide and flat, and there are more than two unbranched fins in the front, which are similar in appearance to LEPIDOPTERA fishes, but there are no tentacles in the nose and mouth, hence the name. Distributed in Nepal, India, Bhutan, China, Myanmar and the mountainous areas of Ganges and Yarlung Zangbo rivers. There are only 1 species of naked-finned kiss fish in China, which are distributed in the tributaries of the lower reaches of Yarlung Zangbo River in Motuo County, Xizang Autonomous Region. The naked-snout fish shows the characteristics of a large number of CYPRINIDAE fish in skeleton and morphological structure, which is obviously a specialized branch of primitive CYPRINIDAE fish to adapt to the rapids environment, and its appearance time should be after the uplift of the Qinghai-Tibet Plateau in the Late Tertiary.