TABLE 3 in Limb histology of the Triassic stem turtles Proterochersis porebensis Szczygielski & Sulej, 2016 and Proganochelys quenstedtii Baur, 1887 with insights into growth patterns of early turtles

TABLE 3. — Carapace, humerus, and femur measurements and length ratios in Proganochelys quenstedtii Baur, 1887, Proterochersis porebensis Szczygielski & Sulej, 2016, and Palaeochersis talampayensis Rougier, Fuente & Arcucci, 1995. Carapace length estimation for SMNS 17203 taken from Gaffney (1990). Abbreviations: R, right; L, left; *, preservation (e.g. damage or deformation) possibly affecting length and resulting ratios.
SpeciesSpecimenMidline carapace length (cm)Humerus length (cm)Humerus/carapace length ratioFemur length (cm)Femur/carapace length ratioHumerus/femur length ratioPalaeochersis talampayensisPULR 06845.5L: 12.7L: 0.28L: 11.9L: 0.26L: 1.07R: 12.0R: 0.26R: 11.6R: 0.25R: 1.03Proganochelys quenstedtiiSMNS 1698048.5L: 13.4L: 0.28L: 15.3L: 0.32L: 0.88R: 13.9R: 0.29R: 15.7*R: 0.32*R: 0.89*SMNS 1720340* (estimated)L: 9.8*L: 0.25*L: 13.1L: 0.32*L: 0.75*––R: 14.4*R: 0.36*–SMNS 17204≥ 50*––L: 15.8L: 0.32> 0.82*R:> 13*R:> 0.26*R: 15.9R: 0.32–SMF 09-F255L: 15.6L: 0.28–––Proterochersis porebensisZPAL V. 39/4839.5––R: 12.7R: 0.32–