I would think it doesn’t really matter. A “species” isn’t a true characteristic of the world, it is rather the concept we develop in order to differentiate one type of organism from others. In so far the species in this example is brand new, because we didn’t know a type of organism like that could exist. And frequently a species might be split up into two or more species. The real world isn’t changing, we just update our understanding of it to better match what we observe.
I would think it doesn’t really matter. A “species” isn’t a true characteristic of the world, it is rather the concept we develop in order to differentiate one type of organism from others. In so far the species in this example is brand new, because we didn’t know a type of organism like that could exist. And frequently a species might be split up into two or more species. The real world isn’t changing, we just update our understanding of it to better match what we observe.