Fig. 5.

Pelobates fuscus. Note the distance between the early rudiments of the posterior limbs and the sacral vertebra (A, L) and late fusion of both halves of the pelvis (E, N). Note also asymmetric development of the sacrum (E). (A, B, H, L, M) Stage 53; (C, I) stage 54; (D, J, N) stage 56; (E) stage 60–61; (F, K) stage 62; (G, P) stage 65 (rudimentary femur, tibia and fibula are marked by an arrow); (O) stage 63 (A in ventral view; B–F in dorsal view; H–K in left lateral or ventrolateral views; L–P in ventral view). Scale bars A–F 5 mm.