Distribution
"Occurs in the Missouri R. and its tributaries of the prairie region, also in Mississippi R. from mouth of Missouri R.at least to Scott county. Drastic declines in abundance and distribution have occurred in recent decades. *001*."
County List
ADAIR, ATCHISON, BOONE, BUCHANAN, CALLAWAY, CARROLL, CHARITON, COLE, COOPER, DAVIESS, FRANKLIN, GASCONADE, GRUNDY, HARRISON, HOLT, HOWARD, JEFFERSON, LAFAYETTE, MERCER, MILLER, MONITEAU, MONTGOMERY, MORGAN, OSAGE, PERRY, PLATTE, PUTNAM, RAY, SALINE, SCHUYLER, SCOTT, ST. CHARLES, ST. LOUIS, STE. GENEVIEVE, WARREN