What makes a Thorny Devil a reptile?

The Thorny Devil is classified as a reptile due to its characteristics that align with reptilian traits. It has a scaly skin made of keratin, which is typical for reptiles, and it lays eggs, a common reproductive method in this class. Additionally, its ectothermic nature, meaning it relies on external sources to regulate its body temperature, further solidifies its classification as a reptile. These features, along with its anatomical structure, distinguish it from other animal groups.