Representative nature of the UW and MSU brain collections

(Diagram in process of being updated according to Mammal Species of the World 2005)

Evolutionary tree adapted from Valentine (Sci. Amer., 1978, pp. 140-158). Widths of branches represent relative numbers of contemporary species. Each letter next to branches represents one specimen in either the Wisconsin (W) or Michigan State (S) collection. Distribution of these letters shows the representative nature of these collections for existing mammals.

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