The secondary evolution of tetrapods towards aquatic environments
3. Mesozoic forms (continued) : diapsids

The secondary evolution of tetrapods towards aquatic environments 3. Mesozoic forms (continued) : diapsids

The secondary evolution of tetrapods towards aquatic environments 3. Mesozoic forms (continued) : diapsids

The secondary evolution of tetrapods towards aquatic environments 3. Mesozoic forms (continued) : diapsids

The secondary evolution of tetrapods towards aquatic environments 3. Mesozoic forms (continued) : diapsids

The secondary evolution of tetrapods towards aquatic environments 3. Mesozoic forms (continued) : diapsids