Hybopsis gracilis gracilis. Missouri River, Thurston County, northeast of Macy, Nebraska. Largest specimen 87.5 mm standard length.
Hybopsis gracilis gulonella. Pecos River, San Miguel County, 3 miles south of town of Pecos, New Mexico. Largest specimen 91 mm standard length.
Fig. 1. Top: Hybopsis gracilis gracilis, 230.0 mm standard length, one of the largest specimens examined. Missouri River, Carson County-Walworth County line, 3 miles northeast of Mobridge, South Dakota, at mouth of Grand River.
Bottom: Hybopsis gracilis gulonella, 121.6 mm standard length, the largest specimen examined of this subspecies. Beaver Creek, Fremont County, 10 miles northeast of Florence, Colorado, on Highway 115.
