The Natural History Museum Basel's reptile type collection includes a global mixture of individual examples of species. They date mostly from the end of the 19th and start of the 20th centuries. The specimens come mainly from the museum's expeditions and collecting trips.
The type collection includes a total of just under 170 taxa.
Larger series come from New Caledonia, Sri Lanka (formerly Ceylon), and Sulawesi (formerly Celebes). In addition to various individual examples, there are smaller type series from Venezuela, Guatemala, the former Gulf Coast, China, Nepal, Indonesia, South America, West, East and South Africa, and from the Bhutan expedition of the Natural History Museum Basel in 1972.
The majority of the described type material comes from the Basel physician Fritz Müller, who worked on the collection at the Natural History Museum Basel at the end of the 19th century, and Jean Roux, who worked as a curator at the Museum from 1902 to 1937.