Primitive "brain" That Caused Dexter's Urges
This page is the CodyCross answer for the clue below from Fauna and Flora, Group 179, Puzzle 1 (Reptiles and Amphibians).
Question is: Primitive "brain" That Caused Dexter's Urges
and the answer is: LIZARD
Word Meaning:
LIZARD — Any reptile of the order Squamata that is not a snake or part of †Mosasauria—typically characterised by a rounded torso, a short neck with an elevated head, a long tail and four limbs, although some species are legless.
Definitions from Wiktionary.