The narrow-bridged musk turtle (Claudius angustatus ) is a species of turtle in the family Kinosternidae. The species is found in Central America and Mexico.
The narrow-bridged musk turtle is typically brown in color. The scutes of the carapace have lines and graining, imparting an almost wood-like appearance. It often has bright-yellow markings on the edges of the carapace. As it ages, algae often heavily cover the shell, masking the patterning and coloration. The head is large and bulbous for its size, with a sharp beak and a long neck. The carapace is domed, with three distinct ridges down the length. Though classified in the subfamily Staurotypinae with the "giant" musk turtles, the narrow-bridged musk turtle generally only grows to a straight carapace length of about 6.5 in (16.5 cm).
The narrow-bridged musk turtle exhibits genetic sex determination, in contrast to most turtles; although the mechanism is not known for certain, it is suspected to be XX/XY like that of its relative Staurotypus.
