Figure 1 in Evolution of South American mammalian predators (Borhyaenoidea): anatomical and palaeobiological implications

Figure 1. Skull and cervical vertebrae in lateral left view, showing the anteroposterior extension of the axial neural process, and the development of strong ventral triangular processes on the axis, C3, and C4 (arrowed). A, Borhyaena tuberata PU 015701 (the fourth cervical is unknown) modified from Sinclair (1906). B, Lycopsis longirostris UCMP 38061 modified from Marshall (1977a). C, Prothylacinus patagonicus PU 015700 (the sixth and seventh cervicals are unknown) modified from Sinclair (1906). D, Cladosictis patagonica PU 015046 (skull) and PU 015170 (cervicals) modified from Sinclair (1906). E, Thylacosmilus atrox FMNH P 14531 (skull, modified from Riggs, 1934), and FMNH P 14344 (cervicals). F, axis in Mayulestes ferox MHNC 1249. The natural curvature of the cervical area is preserved only in Lycopsis (B) and Cladosictis (D). Scale bars: 50 mm in A-E, 5 mm in F.