Fig. 18. Mesosaurus tenuidens Gervais, 1865 in Isometry in mesosaurs: Implications for growth patterns in early amniotes

Fig. 18. Mesosaurus tenuidens Gervais, 1865, metatarsal and phalanx measurements. A–E. Metatarsal and phalanx lengths measured in each 1st–5th toe. Black dashed line represents the empirical curves pn = mt/(n+1) and red dotted lines represent the empirical curve pn = mt/[(n+1)*1.2] for the largest and smallest measured toe, where mt is the length of the metatarsal and pn is the length of the n-th phalanx. F. Lengths are normalized by the metatarsal length for all the measured toes. Black line shows the mean normalized length, black dash-dotted lines represent the 2σ interval. Red dotted line represents the empirical curve pn = mt/[(n+1)*1.2]. The number of individuals measured (N) is indicated in the upper corner of each graph. Abbreviations: mt, metatarsals; p1–p5, phalanges.