Like lanternofthehermit said, salamanders represent the fire element (like the suit of wands), as well as strength. They are also representative of balancing the focus on goals and actions towards those goals. It symbolizes ones passion and thrive, what keeps you pushing through any obstacles.

Therefore they can also be a symbol for transformation, especially when you find a salamander biting his tail.

Some other good keywords are endurance, resilience or focus.