Figure 2
Distribution of A. simus in the context of intra-guild competition and climate. The North American map (i.e., excluding Mexico) is computed from a probability model based on the number of identified specimens (NISP) of A. simus obtained from ref.49. A Kernel filter for the Rancholabrean North American Land Mammal Age (NALMA) was used in ArcGis v.10.050. The extension of the Cordilleran and Laurentide ice-sheets during the early late Wisconsinan (>18,000 yr BP) were drawn from ref.51 by B.F. Histograms represent NISP in percentage of large carnivores (C. dirus, C. lupus, P. atrox, P. onca, H. serum, S fatalis), Ursus (U. americanus, U. arctos) and A. simus. Data obtained from ref.9,52. While the coeval carnivores with A. simus in the north were C. lupus and H. serum, in the south were C. dirus, C. lupus, P. atrox, P. onca, H. serum, and S. fatalis. Drawings made by B.F. Note that both ice-sheets probably acted as a geographical barrier for a continuous genetic flow between the northwestern and southern populations.
