Which class of animals includes both lizards and salamanders?

The class of animals that includes both lizards and salamanders is vertebrates. This classification is based on a key characteristic shared by these animals: they all possess a backbone or vertebral column.

Vertebrates are part of a larger group within the animal kingdom that includes fish, amphibians, reptiles, birds, and mammals. Lizards belong to the class Reptilia, while salamanders are part of the class Amphibia. Both of these classes fall under the broader group of vertebrates, which is defined by the presence of a spinal column.

Understanding that both lizards and salamanders share this common anatomical feature highlights their categorization within the vertebrate group, despite belonging to different specific classes.