Fig. 1: Confuciusornis shifan holotype (PMoL-AB00178).

a Photograph. b Schematic line drawing. cav caudal vertebra, cev cervical vertebra, fu furcula, ga gastralia, lc left coracoid, ldIII left manual digit III, lfe left femur, lh left humerus, lil left ilium, lis left ischium, lm left manus, lp left pes, lra left radiale, lr left radius, ls left scapula, lt left tibiotarsus, lu left ulna, lul left ulnare, ma mandible, pu pubis, py pygostyle, r rib, rc right coracoid, rdcIII claw of right manual digit III, rfe right femur, rfi right fibula, rh right humerus, ris right ischium, rm right manus, rp right pes, rra right radiale, rr right radius, rs right scapula, rt right tibiotarsus, ru right ulna, rul right ulnare, sk skull, sy synsacrum, tv thoracic vertebra. Arrow indicates the position from which the histological section of the right femur was taken. Scale bars: 2 cm.