About Chrysemys dorsalis Agassiz, 1857
Chrysemys dorsalis Agassiz, 1857, commonly called the southern painted turtle, is the smallest species in the genus Chrysemys. It is smaller than any subspecies of C. picta, and reaches an adult length of roughly 10–14 cm (4–6 in). This turtle has a prominent red stripe running along the top of its body, and its lower shell is tan with no spots or almost none. The distribution of the southern painted turtle extends south from extreme southern Illinois and Missouri, generally following the Mississippi River Valley. In Arkansas, the species' range branches west toward Texas, where it occurs in far northeast Texas, specifically the Caddo Lake region, as well as in extreme southeastern Oklahoma's McCurtain County. It can be found across most of Louisiana, where it reaches the Gulf of Mexico in freshwater habitats. To the east, its range includes western Tennessee, northern Mississippi, and most of Alabama, including the Gulf Coast city of Mobile. An isolated population reported from central Texas is currently thought to be non-native. The diet of this species changes as it ages. Juveniles have a diet that is only 13% vegetation, while adult diets are 88% vegetation. This pattern suggests the species prefers small larvae and other animal prey, but juveniles are only able to obtain significant amounts of this prey when they are young. This age-related reversal of feeding habits is also seen in the false map turtle, which shares part of the southern painted turtle's range. The most common plants consumed by adult southern painted turtles are duckweed and algae, and their most common prey items are dragonfly larvae and crayfish.
