I find the Ganesha topic interesting, however consider that to be meaningful as evidence for example of an archetypal genetic or subconscious aspect, we must observe the vision in a large number of people who literally have no knowledge of what an elephant or a mastodon or mammoth look like.

Perhaps people experience the ghosts of mammoths or pother such species?

Perhaps Ganesh himself visits some people selectively?

Is there any evidence supporting the idea that these images are tied to genetic memory or a collective psyche? I have yet to see such indications.