Fig. 10 in The cranial anatomy of the Early Jurassic turtle Kayentachelys aprix

Fig. 10. Main hypotheses of turtle evolution. A. Joyce (2007). B. Gaffney et al. (2007). Outlined shapes document character evolution according to Gaffney (1996) and Gaffney et al. (2007). Solid shapes document the character evolution according the interpretations argued in the present paper. Dashes indicate character changes that are the same in both interpretations. Abbreviations: Kal., Kallokibotion; Mong., Mongolochelys; Pa., Palaeochersis; Pr., Proganochelys; Pro., Proterochersis.