FIGURE 4 in New material of Longipteryx (Aves: Enantiornithes) from the Lower Cretaceous Yixian Formation of China with the first recognized avian tooth crenulations

FIGURE 4. Detailed photograph of the skull of DNHM-D2889, a nearly complete and articulated adult individual from the Lower Cretaceous Yixian Formation and referred to Longipteryx chaoyangensis Zhang et al., 2001.Published as part of Wang, Xuri, Zhao, Bo, Shen, Caizhi, Liu, Sizhao, Gao, Chunling, Cheng, Xiaodong & Zhang, Fengjiao, 2015, New material of Longipteryx (Aves: Enantiornithes) from the Lower Cretaceous Yixian Formation of China with the first recognized avian tooth crenulations, pp. 565-578 in Zootaxa 3941 (4) on page 571, DOI: 10.11646/zootaxa.3941.4.5, http://zenodo.org/record/23948