Publications by authors named "Guillaume Daver"
Theropithecus brumpti is a primate known from numerous craniodental specimens in the Plio-Pleistocene Shungura Formation (Lower Omo Valley, Ethiopia), but the anatomy of its hindlimb is documented only by a few associated and mostly incomplete postcranial specimens. The adaptations of T. brumpti are still debated, with its substrate preferences and its use of squatting postures recently discussed based on anatomical differences when compared with its extant representative, Theropithecus gelada.
View Article and Find Full Text PDFCentral Africa is known as a major center of diversification for extant Old World Monkeys (OWM) and yet has a poorly documented fossil record of monkeys. Here we report a new colobine monkey (Cercopithecoides bruneti sp. nov.
View Article and Find Full Text PDFA hominin third metatarsal discovered in 2007 in Callao Cave (Northern Luzon, the Philippines) and dated to 67 thousand years ago provided the earliest direct evidence of a human presence in the Philippines. Analysis of this foot bone suggested that it belonged to the genus Homo, but to which species was unclear. Here we report the discovery of twelve additional hominin elements that represent at least three individuals that were found in the same stratigraphic layer of Callao Cave as the previously discovered metatarsal.
View Article and Find Full Text PDFArticle Synopsis
- The position of the foramen magnum in hominins has evolved to be more forward-facing, which has been linked to the ability to walk on two legs (bipedalism), but the exact relationship is still not fully understood.
- Recent studies show a correlation between foramen magnum positioning and bipedalism across various mammal species, including primates and rodents.
- The current research finds that while certain ratios can distinguish between walking and non-walking species, only ratios based on basicranial structures effectively differentiate extinct hominins from modern apes, suggesting future studies should focus primarily on these structures for better insights into bipedalism.
Article Synopsis
- Recent findings in West Turkana, Kenya, challenge the assumption that the earliest stone tools were made by the genus Homo and linked to climate change and savannah grasslands.
- *The Lomekwi 3 site, dated at 3.3 million years old, reveals ancient hominin tools found alongside fossils in a wooded environment, indicating an earlier technological development.
- *The term 'Lomekwian' is proposed for this discovery, suggesting a new phase in archaeological history that predates the known Oldowan tools by 700,000 years.*
Only two distal epiphyses of a radius and ulna are consensually attributed to the holotype skeleton of Proconsul heseloni, KNM-RU 2036. Here, we describe seven adult and immature distal antebrachial (radial and ulnar) epiphyses from two other individuals of P. heseloni from the Lower Miocene deposits of the Kaswanga Primate Site (KPS), Rusinga Island, Kenya.
View Article and Find Full Text PDFThe purpose of this study is to provide new data on carpal kinematics in primates in order to deepen our understanding of the relationships between wrist morphology and function. To that end, we provide preliminary data on carpal kinematics in seven species of quadrupedal monkeys that have not been previously investigated in this regard (cercopithecoids, n = 4; ceboids, n = 3). We radiographed wrists from cadavers at their maximum radial and ulnar deviations, as well as at maximum flexion and extension.
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