Owning Barbour's map turtles is illegal in Georgia, Michigan, and Alabama. The limit is two turtles per person in Florida. Like all map turtles, they are under the protection of the Salmonellosis Four-inch Regulation, disallowing these turtles to be sold if they are under the length of 4 in (10 cm).
Male Barbour's map turtles are on average 3.5 to 5.5 in (9–14 cm) in carapace length. Females can vary from 6 to 12.5 in (15 – 32 cm) in carapace length. "Females attain really imposing dimensions, and their heads are enormously enlarged". These turtles possess black-tipped spines on the second, third, and fourth vertebrae. These spines are very noticeable in males, and resemble a dorsal fin.
^ abcConant, Roger. 1975. A Field Guide to Reptiles and Amphibians of Eastern and Central North America, Second Edition. Boston: Houghton Mifflin. xviii + 429 pp. + 48 plates. ISBN 0-395-19979-4 (hardcover), ISBN 0-395-19977-8 (paperback). (Graptemys barbouri, p. 55 + Plates 5, 8 + Map 18).
^Beltz, Ellin. 2006. Scientific and Common Names of the Reptiles and Amphibians of North America - Explained. ebeltz.net/herps/biogappx.html.
^Beolens, Bo; Michael Watkins; Michael Grayson. 2011. The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN 978-1-4214-0135-5. (Graptemys barbouri, p. 16).