Fig. 4: Selected axial elements of Confuciusornis shifan holotype (PMoL-AB00178). | Communications Biology

Fig. 4: Selected axial elements of Confuciusornis shifan holotype (PMoL-AB00178).

From: A new confuciusornithid bird with a secondary epiphyseal ossification reveals phylogenetic changes in confuciusornithid flight mode

Fig. 4: Selected axial elements of Confuciusornis shifan holotype (PMoL-AB00178).The alt text for this image may have been generated using AI.

a cervical vertebrae. b synsacrum. c pygostyle. sy synsacrum. Arrows in b and c indicate the longitudinal ridge on the ventral surface of the synsacrum and the positions of foramina along the pygostyle, respectively. Also see Supplementary Fig. 1 for a close-up of the distal part of the pygostyle. Scale bars: 0.5 cm in a, c; 1 cm in b.

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