What significant difference in morphology makes the survival of Thylacoleo less plausible than reports of the Thylacine?

Answer

Thylacoleo was more powerful, heavier, and possessed a radically different hunting style

There is a substantial difference in scale and ecological visibility between the Thylacine (*Thylacinus cynocephalus*) and *Thylacoleo*. The marsupial lion was a far more robust, heavier, and specialized ambush predator with a unique structural design. The Thylacine, being canid-like, may have had a lower threshold for being overlooked if small populations survived briefly. However, for the massive, powerful, and structurally bizarre *Thylacoleo* to evade all modern documentation for 46 millennia requires a population size and habitat that seem ecologically unsustainable and impossible to hide.

What significant difference in morphology makes the survival of Thylacoleo less plausible than reports of the Thylacine?

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