you were right an anthropology major is going to correct it, altough you did a pretty good job, just some very controverital and some have little evidence to show they were our ancestors. Frist there is alot of controversy with ardipithecus ramidus as to if it falls in our ancestors or is an offshoot. the same with A. anamensis, though A. anamensis is better accepted. THe only other major problem is that the robust forms of Australophithecus(A. boisei and A. robustus) are pretty well accepted as an offshoot of the human linage based on skull shape and size. Also the lived concurtently with H. habilis and have very differnt body types (look at their jaw size and the sagital crest they have. H. heidelbergensis and H. ergaster are usally classed as Homo erectus and people fight about weather they are just two groups of variation or if they are their own speices. Also almost all of these speices at one time or another lived concurently with a speices that was there before it. THere is alot of overlap in their time lines, so the old speices does not necessarily die out as soon as a new one comes along.
Also you forgot archaic homo sapiens, which differ from modern Homo sapiens in some anatomical freature (im not going to list them all here but if intrested let me know). Neaderthals are controvertal as to weather or not they are very specialized archaic Homo sapiens (I think they are) or if they are their own speices, so we are going to leave that one alone.
As for diverging from other apes the last human ancestor we shared with another ape was about ~5.5 million years ago. The living ape that also had the same ancestor was the chimpanzee.
And for the reason that apes are still around even the older ones, they are here because they explioted a differnt enviromental niche in nature. A new speices can evolve as an offshoot of an old one and the orginal speices can survive if they exploit differnt niches in nature or if there is selective presure that gives neither an advantage. Evolution does not care how old a speices is, only if it is addapted to its enviroment. Thats why some reptile speices have change very little in millions of years.
Also you forgot archaic homo sapiens, which differ from modern Homo sapiens in some anatomical freature (im not going to list them all here but if intrested let me know). Neaderthals are controvertal as to weather or not they are very specialized archaic Homo sapiens (I think they are) or if they are their own speices, so we are going to leave that one alone.
As for diverging from other apes the last human ancestor we shared with another ape was about ~5.5 million years ago. The living ape that also had the same ancestor was the chimpanzee.
And for the reason that apes are still around even the older ones, they are here because they explioted a differnt enviromental niche in nature. A new speices can evolve as an offshoot of an old one and the orginal speices can survive if they exploit differnt niches in nature or if there is selective presure that gives neither an advantage. Evolution does not care how old a speices is, only if it is addapted to its enviroment. Thats why some reptile speices have change very little in millions of years.