Fig. 5: Schematic of American black (Ursus americanus; all-fours) and brown (U. arctos; standing) bears depicting occupation of unique lineages across North America over time. | Heredity

Fig. 5: Schematic of American black (Ursus americanus; all-fours) and brown (U. arctos; standing) bears depicting occupation of unique lineages across North America over time.

From: Phylogeography of introgression: Spatial and temporal analyses identify two introgression events between brown and American black bears

Fig. 5

Each map shows water as glaciers (white), glacial freshwater lakes (peacock), and ocean (pale blue). The time stamps refer to the specific interpolated glacier layers (Dyke 2004) and associated Marine Isotope Stages (MIS). Bear pictogram color denotes the lineages of the respective species, where American black bears include: orange- western; blue- eastern; and purple- northern SEAK; and brown bears include: tan- North American lineage with clade 4 mitochondrial haplotypes; dark brown- North American lineage with 2a haplotypes; gold- haplotype 2c; and grey- haplotypes 3c (extinct) and 3b (extant although not discussed in this work).

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