The development of the osteocranium of Pleurodeles waltlii Michahelles

Under optimal conditions the development of the osteocranium covers the major part of the larval period and lasts about three and a half months. The earliest ossifications are of dermal origin and concern the tooth‐bearing bones. The poorly developed enchondral ossifications found in Urodela, appear at a much later stage, just before metamorphosis.