Figure 5 in A new delphinid from the lower Pliocene of the North Sea and the early radiations of true dolphins

Figure 5. Schematic dorsal view of the skull in a series of extinct delphinids from the late Miocene and Plio–Pleistocene. Based on photos and drawings in Bianucci (1996, 2013); Fordyce et al. (2002); Aguirre-FernAEndez et al. (2009); Murakami et al. (2014), Kimura and Hasegawa (2020), and photos kindly provided by Mark Bosselaers (for Tursiops oligodon) and Giovanni Bianucci (for Lagenorhynchus harmatuki and Stenella rayi). Dotted lines correspond to incomplete elements. All crania scaled at same width of premaxillary sac fossae. Scale bars = 100 mm.