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The family is Cornaceae (dogwood family) I believe.
Are you sure they are federally listed? They seem to be pretty common in the Southeastern lotic systems. Also it has a very close relative, Pearl River Map Turtle or Miss. Map Turtle that was just discovered to science in January of 2010. The even more rare, yellow-blotched map turtle and yellow-ringed map turtles seem to be making slow comeback in these same systems, being they are such picky nesters.
Juvenile eastern musk turtle?
The 2 smaller ones are map turtles I believe.. Not sure which species tho. The larger one appears to be a river cooter