The Escambia map turtle (Graptemys ernsti) is a species of turtle in the Emydidae family. It is endemic to the United States.
It is found in southern Alabama and western Florida, in rivers which drain into Escambia Bay.
The specific name, ernsti, is in honor of American herpetologist Dr. Carl Henry Ernst (born 1938).
Lovich, J.E., and C.J. McCoy. 1992. Review of the Graptemys pulchra Group (Reptilia: Testudines: Emydidae), with Descriptions of Two New Species. Annals of Carnegie Museum 61 (4): 293-315. ("Grapemys ernsti, new species", pp. 300-302, Figures 4-5.)