Comparative pelvic development in the Australian lungfish (left) and the axolotl (right). Cleared and stained larvae of Neoceratodus forsteri (A-F) and of Ambystoma mexicanum (G-L) showing development of the pelvic girdle. Cartilage is stained blue and bone in red. Neoceratodus: A) Stage 49, B) Stage 51, C) Stage 53, D) ‘Stage 59’, E) ‘Stage 60’, F) ‘Stage 61’ All in ventral view. Ambystoma mexicanum: G) Stage 54, H) 1.5 cm, I) 1.5 cm, J) 2.0 cm, K) 3.0 cm, L) 3.5 cm. Anterior to the left. The anterior process and ypsiloid cartilage are in grey to denote that they are non homologous structures. Ac, acetabulum; Ant pr, anterior process; Fe, femur; Il, ilium; Is, ischium; Pb, pubis; Sr, sacral rib; Vc, vertebral column; Yp c, ypsiloid cartilage.