Corasa
The corasa are a direct descendant of the aposolis. They are the first draconic species known to have evolved to have toes, which they used to grip rocks as they crawled around on the ocean floor. This helped them adapt to live on land quite fast.
While evolving to live on land, their tails thickened for balance and they grew long fins on the side of their heads for help with hearing.
Six-limbed dragons are the descendants of the corasa, with most draconic species capable of flight having evolved from these creatures. They dominate the land, though not many ocean-dwelling dragons are descended from the corasa.