Black-knobbed map turtle

The black-knobbed map turtle (Graptemys nigrinoda) is a species of aquatic turtles. Their skin is light gray and have spikes on their shell.Blankenship, Emmett L., Brian P. Butterfield, and James C. Goodwin. 2008. "Grapemys Nigrinoda Cagle 1954- Black-Knobbed Map Turtle, Black-knobbed Sawback." Coservation Biology of Freshwater Turtles and Tortoises: n. pag. Print. They are part of the Graptemys genus and were once called the black-knobbed sawback turtle. They live in rivers in the Mobile Bay in Alabama and Mississippi.Bebler & King. 1979 "Pond and Box Turtle Family." The Audubon Society Field Guide to North American Reptiles & Amphibians. 2nd ed. New York: Alfred A. Knopf. 462-63. Print.

References

Other websites

 Tortoise & Freshwater Turtle Specialist Group 1996.  Graptemys nigrinoda .   2006 IUCN Red List of Threatened Species.  Downloaded on 29 July 2007.

Category:Turtles of North America