How does KNM-ER 1813 differ from KNM-ER 1470?

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An illustration of Homo habilis, an early human ancestor, shown walking upright with a hairy body and ape-like features. A scale beside the figure indicates height in inches and centimeters. — Homo habilis Artist's rendering of *Homo habilis*, which lived from 2 to 1.5 million years ago.

The fossils KNM-ER 1813 and KNM-ER 1470 are both significant specimens from the Koobi Fora region, but they differ notably in size and classification.1

Size: KNM-ER 1813 is a smaller cranium compared to KNM-ER 1470.1
Classification: While KNM-ER 1813 is often grouped with Homo habilis, most scientists have reassigned KNM-ER 1470 to the species Homo rudolfensis.1
Morphological Affinities: KNM-ER 1813 resembles the specimen OH 13 in its tooth size and morphology. In contrast, KNM-ER 1470 is characterized by a larger brain volume of approximately 750 cubic cm and a facial skeleton that, while possessing Homo-like features, also exhibits a flattened lower face reminiscent of Australopithecus.1

Would you like to know more about the specific anatomical features that distinguish Homo habilis from other early hominins?