Yes, that doesn’t change my point. In both cases it looks like the ecosystem had multiple niches that in the fossil record previously having different species apparently all filled with a single species. With Trex, one of the current theories is that it filled different niches as it grew up.
Although with Trex, there may have been a half sized version that was hunting alongside the big one(s).
If I remember correctly, those two species were actually separated by millions of years.
Yes, that doesn’t change my point. In both cases it looks like the ecosystem had multiple niches that in the fossil record previously having different species apparently all filled with a single species. With Trex, one of the current theories is that it filled different niches as it grew up.
Although with Trex, there may have been a half sized version that was hunting alongside the big one(s).