False Map Turtle

Media
Image of a false map turtle
Scientific Name
Graptemys pseudogeographica pseudogeographica
Family
Emydidae (basking, marsh, and box turtles) in the order Testudines (turtles)
Description

A medium-sized species with a prominent keel along the center of the upper shell. The hind edge of the upper shell is strongly serrated. The upper shell is brown or olive with narrow, yellow, connected circles or lines. The lower shell is greenish yellow with several light brown lines following the scute seams. The head and neck are brown or greenish gray with numerous yellow lines bordered by dark brown or black. The thick yellow line behind each eye forms a backward L shape. A wide-eyed appearance is caused by the bright yellow eye with a round, black pupil.

Similar species: The Mississippi map turtle subspecies (G. p. kohnii) has a slightly different shape for the yellow mark behind each eye. Instead of having the L mark and narrow yellow lines touching the back of each eye, the Mississippi subspecies has a crescent behind each eye, and the yellow lines don’t touch the eye. In eastern Missouri, especially along the Mississippi, it can be difficult to tell the subspecies apart.

Size
Upper shell length: 3 to 10 inches.
Where To Find
False Map Turtle Distribution Map
Occurs in central, northeastern, northwestern, and southeastern Missouri. The Mississippi map turtle subspecies also occurs in Missouri. The ranges overlap in southeastern, eastern, and northeastern Missouri, and some turtles have characteristics of both.
This semiaquatic species lives primarily in large rivers such as the Missouri and Mississippi, river sloughs, and oxbow lakes or constructed reservoirs. It will often bask on logs or rocks but is shy and will quickly drop into the water at the slightest sign of danger.
This species eats both aquatic plants and animals, including snails, insects, crayfish, and dead fish.
Life Cycle
The false map turtle may be active from late March to early October. To overwinter, it takes shelter in mud at the bottom of sloughs or lakes, though it sometimes remains semi-active during mild winters in the southern third of the state. Courtship and breeding occur in the water, usually in the spring. Egg-laying begins in June and lasts through July, with 6–13 eggs per female. Hatching takes place in late summer or early autumn. The shells of the young are about 1¼ inches long.
Map turtles, when young, are sometimes kept as pets. Conservationists in Europe are concerned that US-exported aquatic turtles, if released into the wild, become invasive in their waters.
As predators, map turtles help control the populations of the animals they consume. Map turtles are also a prey species, despite their shells. Eggs and hatchlings can become easy prey for a raccoon, snake, heron, or other predatory animal large enough to swallow them.
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Where to See Species

Windy Bar Island Conservation Area is extensively forested, with approximately 90 percent of the island chain composed of riverfront forest or wet-mesic bottomland forest natural communities.
About Reptiles and Amphibians in Missouri
Missouri’s herptiles comprise 43 amphibians and 75 reptiles. Amphibians, including salamanders, toads, and frogs, are vertebrate animals that spend at least part of their life cycle in water. They usually have moist skin, lack scales or claws, and are ectothermal (cold-blooded), so they do not produce their own body heat the way birds and mammals do. Reptiles, including turtles, lizards, and snakes, are also vertebrates, and most are ectothermal, but unlike amphibians, reptiles have dry skin with scales, the ones with legs have claws, and they do not have to live part of their lives in water.