Actually the turtles arent as apparently an ancient a species as we first thought.
The reason for the confusion is the shape of their skull, as far as i can remember it has no holes in it (many skulls have one or two holes for jaw muscle attachments). It is also the arrangement that some fossils have had (no holes was the first in the timescale, the holes started appearing later), and appeared to be extrememly similar in shape to todays turtles. However it turns out that the no holes arrangement has evolved again from i think single holed skulls (i used to know the technical names for the skull designs but ah well). And hence turtles arent as ancient a family as we thought, they just look like one.
Unseul
Give a man a fire and he's warm for a day. Set a man on fire and he's warm for the rest of his life....
Do unto others before they do unto you.