"Homo, Kenyanthropus" and "Paranthropus". The teeth formed part of a skull that would become the holotype of "Paranthropus robustus". "H. habilis" coexisted with other early hominins, such as the robust "Paranthropus" and "Homo erectus". The necks of the molars are proportionally similar to those of "A. afarensis" and "Paranthropus". In 1969 the discovery of a cranium of "Paranthropus boisei" caused great excitement. There is currently no clear consensus on the validity of "Paranthropus". The evolution of the Paranthropus occurred 2.7 million years ago. These have been attributed to Australopithecus, early Homo and Paranthropus. There is also evidence that some species of "Paranthropus" utilized stone tools. Sagittal crests are found in robust great apes, and some early hominins ("Paranthropus"). Likewise, the seventh figure ("Paranthropus") is said to be "an evolutionary dead end". It is sometimes suggested that "Paranthropus" and "Homo" are sister taxa, both evolving from "Australopithecus". Over a million years ago, hominins such as Paranthropus suffered from cavities. South African "Paranthropus" appear to have outlasted their East African counterparts. "Australopithecus africanus", and "Paranthropus boisei".