Everybody chill!
We cool?
That is either a
Cnemidophorus species or
Ameiva species. Definitely a Teidae (the new world counterpart of the lacertas). For a definite ID, I would need:
1) a side view including a clear shot of the head, and;
2) some idea of the mature size.
I can tell you this, though--it does
not belong in a rainforest terrarium! It is too humid, and it will dig up the plants.
Peace,
G