SUBSPECIES
Some authorities split the species into two subspecies. The central longear sunfish, L. megalotis megalotis, is generally found in the southeastern portion of the range, on the east side of the Mississippi River, and the southern half of Ohio and Pennsylvania. The northern longear sunfish, L. megalotis peltastes, on the other hand, is found primarily in the northwest portion of the longears range, from Wisconsin, Minnesota, northern Ohio through Michigan and into Ontario.
Trautman (1957) distinguishes between the two subspecies by saying the northern longear sunfish, L. megalotis megalotis, is generally smaller, with a less pronounced opercular flap that is horizontal in orientation. The central longear, L. m. peltastes, is generally larger and has a longer opercular flap at a 45° angle, posterior end higher.