. "* Graptemys nigrinoda delticola (Folkerts & Mount, 1969)" . "IUCN2.3" . . "* Graptemys nigrinoda nigrinoda" . "* Graptemys nigrinoda (Cagle, 1954)" . ";Graptemys nigrinoda nigrinoda" . ";Graptemys nigrinoda delticola" . "(—Cochran&Goin, 1970)" . . . . . . "LR/nt" . "(—Mertens& Wermuth, 1955)" . "* Graptemys oculifera nigrinoda" . . "* Malaclemys nigrinoda" . . "(— Folkerts & Mount, 1969)" . . . "The black-knobbed map turtle (Graptemys nigrinoda), formerly known as the black-knobbed sawback, is a small to medium-sized aquatic turtle with light gray skin. Some of the most distinguishing characteristics of the black-knobbed map turtle, and the Graptemys genus, are the protruding \u201Cspikes\u201D on the turtle\u2019s carapace. This species inhabits mainly the fall lines of rivers in the Mobile Bay drainage, in Alabama and Mississippi."@en .