Position of the 21 landmarks used for body shape analyses of the Brachymystax: 1, anterior tip of the snout at the level of the upper jaw; 2, posterior margin of the neurocranium; 3, dorsal fin origin; 4, posterior insertion of the dorsal fin base; 5, origin of adipose fin; 6, terminal of adipose fin base; 7, dorsal origin of caudal fin; 8, middle of caudal base; 9, ventral origin of caudal fin; 10, posterior end of anal fin base; 11, origin of anal fin; 12, origin of pelvic fin; 13, origin of pectoral fin; 14, trailing edge of the gill cover; 15, indentation where the opercular cover and sternohyoideus muscle cross; 16, upper jaw tip (17 and 18, diameter of the eye; 19, the middle point of the line going from the caudal part of the head to the bottom of the head; 20, the middle point of the line going from the rostral point of the dorsal fin base to the bottom of the body; 21, the middle point of the line going from the rostral point of the adipose fin base to the bottom of the body (19, 20 and 21 were unbending landmarks). (Picture is cited from Yue and Chen, 1998).