From AP via Washington Post: (hat tip Floyd)
...In their new findings, the Leakey team says that none of their newest fossil discoveries match erectus, so they had to be from another flat-faced relatively large species with big teeth.
The new specimens have “a really distinct profile” and thus they are “something very different,” said Meave Leakey, describing the study published online Wednesday in Nature.
What these new bones did match was an old fossil that Meave and her husband Richard helped find in 1972 that was baffling. That skull, called 1470, just didn’t fit with Homo erectus, the Leakeys contended. They said it was too flat-faced with a non-jutting jaw.