File:Ningchengodon & Origolestes comparison.png

English: Comparison of zhangheotheriid mammals Ningchengodon foxi gen. et sp. nov. (PMOL-AM00036) from the Barremian–Aptian, Lower Cretaceous; Yixian Formation of Xidayingzi, Ningcheng Basin, Inner Mongolia, China (A, C1, D1, D2) and selected specimens of Origolestes lii Mao et al., 2020: JZT-DB0064 from Lower Cretaceous of Yixian Formation of Lujiatun, Beipiao, Liaoning, China (B, C3) and IVPP V14383-1 from from Lower Cretaceous of Yixian Formation of Lujiatun, Beipiao, Liaoning, China (C2, D2, D3). A. PMOL-AM00036 (holotype); right mandible and teeth in labial view. B. JZT-DB0064; right mandible and teeth in labial view (B1), left mandible in labial view (mirrored, B2). C. Differences in premolars: PMOL-AM00036, right ultimate premolar p3 (C1); IVPP V14383-1 (type specimen), left p4 in lingual view (mirrored, C2); and JZT-DB0064, right p4 in lingual view (C3). D. Differences in first molars: PMOL-AM00036, right m1 in lingual view (D1); PMOL-AM00036 (CT reconstruction), and IVPP V14383-1 (drawing) m1 in lingual views (D2); IVPP V14383-1, left m1 in lingual view (D3). C, D, CT reconstructions and drawings of teeth on same scale, showing m1 of O. lii 4–9% larger than that in N. foxi gen. et sp. nov. A, B, C1, D1, D2, CT reconstructions; C2, C3, D2, D3, stylistic stipple-drawings based on images published by Mao et al. 2020.