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05-20-2018, 09:25 PM( This post was last modified: 05-20-2018, 09:39 PM by GrizzlyClaws )
Since Smilodon fatalis and Smilodon populator were likely derived from the more primitive Smilodon gracilis, and ironically both species had predated Panthera atrox in the history of America.
But why Smilodon fatalis just let the newly arrived Panthera atrox seized the niche position as the top predator in its domain, while Smilodon populator remained occupying that position?
Maybe fatalis was positioned to be the second fiddle, while populator chose to evolve as the apex predator?