Mississippi map turtle

The Mississippi map turtle (Graptemys pseudogeographica kohni) is a subspecies of land and water turtle belonging to the family Emydidae. G. p. kohni is endemic to the central United States.

Etymology
The Mississippi map turtle derives its common name not from the state of Mississippi, but rather from the Mississippi River.

The specific name, kohni, is in honor of amateur naturalist Joseph Gustave Kohn (1837–1906) of New Orleans, Louisiana, who collected the type specimen.

Geographic range
Graptemys pseudogeographica kohni is found along the Mississippi River and its tributaries, from Illinois and Missouri southward.

Description
Their grey shells are covered in yellow lines resembling contour lines.

Captivity
The Mississippi map turtle is a popular pet for aquarists and is very enjoyable to watch.