The problem is that there are precious few fossils of either H. habilis or H. rudolfensis, especially from the neck down. ~ Ann Gibbons
A handful of representative fossils suggest that H. habilis had company 1.9 MYA. H. rudolfensis has been identified as a separate species from H. habilis based upon fragmentary evidence that indicates a different hominin.
H. rudolfensis is named after Kenyan Lake Rudolf, where its fossils were found
Compared to H. habilis, H. rudolfensis was larger and had a bigger brain. With a jaw indicating better chewing ability, H. rudolfensis may well have had a different diet.
It could be a Homo habilis, but it could also be another species. ~ Bernard Wood