The Spider Tortoise (Pyxis arachnoides) is a reptile in the Testudinidae family. It is named after the pattern on its shell. 

The Spider Tortoise has a web-like pattern of yellow lines on its dark-brown carapace (upper shell). It has a dark head with yellow spots. It has a yellow, semi-hinged underbelly – the under shell is called a plastron. It pulls its head into its shell for protection. Its legs and tail are brown.