Complex sentence: They are found in the Mississippi River basin from Ohio to Minnesota and in southern Mississippi, northern Louisiana and southeastern Oklahoma, and on the Gulf Slope of Escambia, Mobile Bay, and the Pearl River drainages.
Split into simpler sentences: They are found in the Mississippi River basin from Ohio to Minnesota and in southern Mississippi. Also in northern Louisiana and southeastern Oklahoma, and on the Gulf Slope of Escambia, Mobile Bay and the Pearl River drainages.