The 28 Be ages obtained within the anthracotheriid unit containing Toumaï bracket, by absolute dating, the age of Sahelanthropus tchadensis to lie between 6.8 and 7.2 Ma.
This chronological constraint is an important cornerstone both for establishing the earliest stages of hominid evolution and for new calibrations of the molecular clock.
Some palaeontologists have disputed this interpretation, stating that the basicranium, as well as dentition and facial features, do not represent adaptations unique to the hominin clade, nor indicative of bipedalism; The fossils were discovered in the Djurab Desert of Chad by a team of four led by a Frenchman, Alain Beauvilain, and three Chadians, Adoum Mahamat, Djimdoumalbaye Ahounta, and Gongdibé Fanoné, members of the Mission paleoanthropologique Franco-tchadienne led by Michel Brunet.
Camelins dispersed into Eurasia from North America in the late Miocene and almost instantaneously spread in western Europe and Africa.
The size and morphology of the fossils found at Verduno are consistent with those of Paracamelus, the earliest Old World camelin.
Ages were determined at two hominid localities from the Chad Basin in the Djurab Desert (Northern Chad). Pierre Batteau for assistance in the statistical analysis; Dr.
In the Koro Toro fossiliferous area, KT 12 locality (16 degrees 00' N, 18 degrees 53' E) was the site of discovery of Australopithecus bahrelghazali (Abel) and in the Toros-Menalla fossiliferous area, TM 266 locality (16 degrees 15' N, 17 degrees 29' E) was the site of discovery of Sahelanthropus tchadensis (Toumaï). Baba El-Hadj Mallah (Centre National d'Appui de la Recherche); the French Army (Mission d'Assistance Militaire et Epervier); all the Mission Paléoanthropologique Franco-Tchadienne members; G.