Abstract of Todd, T.N., and G.R. Smith. 1981. Differentiation in Coregonus zenithicus in Lake Superior. Canadian J. Fish. Aquatic Sci. 37(12):2228-2235.

Coregonus zenithicus differentiated into different spawning populations with different allometries in lake superior; two of the populations were named C. reighardi dymondi and C. nigripinnis cyanopterus by Koelz. Intralacustrine differentiation is supported.