Cagle's map turtle has intricate patterns on the carapace and plastron, as well as serrated edges on the posterior of the carapace, as is typical of all map turtles. It is smaller than most map turtles, and very sexually dimorphic, with males reaching only 4 in (10 cm) straight carapace length, while females can exceed 7 in (18 cm) in straight carapace length.[4]
Like all turtles, G. cagleiisoviparous.[6] A sexually mature female may lay up to three clutches of eggs in a year.[1] Clutch size is small, only one to six eggs.[1]
^Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN978-1-4214-0135-5. (Graptemys caglei, p. 46).
Conant R (1975). A Field Guide to Reptiles and Amphibians of Eastern and Central North America, Second Edition. Boston: Houghton Mifflin. xviii + 429 pp. + 48 plates. ISBN0-395-19979-4 (hardback), ISBN0-395-19977-8 (paperback). (Graptemys caglei, p. 58 + Figure 9 on p. 56 + Map 21).
Haynes, David; McKown, Ronald R. (1974). "A New Species of Map Turtle (Genus Graptemys) from the Guadalupe River System in Texas". Tulane Studies in Zoology and Botany18 (4): 143–152. ("Graptemys caglei new species").
Powell R, Conant R, Collins JT (2016). Peterson Field Guide to Reptiles and Amphibians of Eastern and Central North America, Fourth Edition. Boston and New York: Houghton Mifflin Harcourt. xiv + 494 pp. ISBN978-0-544-12997-9. (Graptemys caglei, p. 202-203, Figure 92 + Figure 82 on p. 178).
