There are a number of possibilities here and I just don't know if we will ever know for sure which it is. We do know that there is a line of hominids leading in a VERY well-documented developmental line right up to h. Sapiens. This would SEEM to indicate that h. Sapiens is, indeed, right in this line (and Lucaspa would say that if it is NOT so, then God would be deceiving us, and I understand that argument and agree that the evidence is, indeed, that strong). BUT, and yet, however . . .
There IS something special about Man: we have a soul. We were made in His image, which separates us from all other creatures and means that SOMETHING happened along the way which is beyond what evolutionary models can tell us. There are a number of possibilities, and I will list a few going from most traditional to most "evolutionary", but it is very possible (likely?) that none of these are correct:
1. God did create a single Adam and a single Eve at some point, and the literal reading in Genesis is correct on this point. This would leave us to wonder why God would create a whole series of hominid species whose development seem to lead right into h. Sapiens, but who are we to judge God's reasoning. If he wants to allow for the evolution of A, B, C, D and then specially create what would naturally be "E", fine with me. He is God, I would not presume to question His actions. I might be curious, though.
1(a) would be that all h. Sapiens then descended from those two individuals, who were the ONLY h. Sapiens alive to begin with. There are a LOT of problems with this traditional reading.
1(b) would be that, after God created this first Adam and Eve, He created other h. Sapiens. Also has problems.
2. God allowed h. Sapiens to develop as evolution has described, then chose two "exemplars" from the group, or even specially created two more of them, infused them with a soul and placed them in a separate place (Eden). Don't know what God did with the rest of them, though, let them remain soulless and all die out? Infuse them as well? All very speculative, but I have heard it bandied about.
3. God allowed h. Sapiens to evolve as evolution has described, but at some point infused, or uplifted the entire species, and "Adam and Eve" are allegorical models of this first group of God's chosen creations: Man. The stories about Adam and Eve would be metaphors of the actions of the whole group. This would explain a lot, and is very popular, but it is also very speculative. One supporting piece of evidence from Scripture is the use of the word Adam, which we all know means simply Man. Also the Scripture which states that the man and woman collectively were called Man (Adam). Another is the "Eve" theory of DNA genetics which shows that all humans can trace their lineage back to a single female. This does not mean that she would have to be the ONLY female of her species alive at the time, only that eventually only one female line would survive. Simple mathematics (not so simple, really, but it works out that way). This would mean that a chosen EVE could be the "mother of all who live" even if she was not the only woman alive at the time.
4. God allowed h.Sapiens to evolve as evolution has described, and did not need to infuse a soul or do any type of uplift since He had built right into the process the fact that at some particular point in that evolution, it would all come together into that point of self-awareness which exemplifies the soul, when the species reached that critical mass and became in the likeness of God.
Again, I have no idea what actually happened, and in truth it doesn't really matter in the big scheme of things.