There isn't a single, universally recognized "god of reptiles" across all mythologies. Reptiles are often associated with different deities or have specific deities associated with certain types of reptiles. Here are a few examples:
* Sobek (Egyptian): A crocodile-headed god associated with the Nile, military prowess, and protection. He was considered a powerful and fearsome deity.
* Apep/Apophis (Egyptian): A giant serpent, the embodiment of chaos, who was the enemy of the sun god Ra.
* Quetzalcoatl (Aztec/Mesoamerican): The "feathered serpent" god, a major deity associated with wind, wisdom, and the morning star.
* Kukulkan (Mayan): The Mayan equivalent of Quetzalcoatl, also a feathered serpent god.
* Vucub Caquix (Mayan): A bird demon who claimed to be the sun or moon. He was eventually defeated by the Hero Twins, but the myth includes serpent imagery.
* Naga (Hindu/Buddhist): Serpent deities or beings that are often associated with water, wealth, and protection.
* Vasuki (Hindu): A serpent king who was used as a rope to churn the ocean of milk in Hindu mythology.
Therefore, while there isn't a single "god of reptiles," many deities are associated with reptilian imagery or have power over certain reptiles. Sobek is probably the closest to being a general reptile deity, but even he is more specifically associated with crocodiles and the Nile.