The size of the ancestor elephant is similar to that of the current underage Asian elephant.
It may live in water part of the time.
Like hippopotamus, eyes and ears are above the head, so that when rolling in the swamp, eyes and ears can still emerge from the water to observe the surrounding situation.
Archaeopteryx doesn't have a long nose, but it has some characteristics similar to those when elephants began to evolve, so when people first discovered it, they thought it was the ancestor of elephants. So it's called Archaeopteryx.
But now many paleontologists believe that another ancient elephant found in Africa is the true ancestor of elephants, and the ancestor elephant is only a side branch in the evolutionary history of long nose.
Because the living habits are far from the evolution of the mainstream proboscis, they can't even represent the primitive proboscis.