Beyond KNM-ER 1470, there is disagreement on which specimens actually belong in "H. rudolfensis" as it is difficult to assign with accuracy remains that do not preserve the face and jaw. No "H. rudolfensis" bodily elements have been definitively associated with a skull and thus to the species. Most proposed "H. rudolfensis" fossils come from Koobi Fora and date to 1.9–1.85 mya. Remains from the Shungura Formation, Ethiopia, and Uraha, Malawi, are dated as far back as 2.5–2.4 mya, which would make it the earliest identified species of "Homo". The latest potential specimen is KNM-ER 819 dating to 1.65–1.55 mya.