Ardipithecus ramidus and the Paleobiology of Early Hominids

@article{White2009ArdipithecusRA,
  title={Ardipithecus ramidus and the Paleobiology of Early Hominids},
  author={Tim D. White and Berhane Abrha Asfaw and Yonas Beyene and Yohannes Haile-Selassie and C. Owen Lovejoy and Gen Suwa and Giday Woldegabriel},
  journal={Science},
  year={2009},
  volume={326},
  pages={64 - 86}
}
Hominid fossils predating the emergence of Australopithecus have been sparse and fragmentary. [] Key Result More than 110 specimens recovered from 4.4-million-year-old sediments include a partial skeleton with much of the skull, hands, feet, limbs, and pelvis. This hominid combined arboreal palmigrade clambering and careful climbing with a form of terrestrial bipedality more primitive than that of Australopithecus. Ar.
Palaeoenvironments and the origin of hominid bipedalism
Abstract It has long been accepted that hominids emerged during the Pliocene in a savannah environment in which a terrestrial quadruped gradually developed bipedal adaptations. However, data from the
Reexamining Human Origins in Light of Ardipithecus ramidus
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A proposed adaptive suite for the emergence of Ardipithecus from the last common ancestor that the authors shared with chimpanzees accounts for these principal ape/human differences, as well as the marked demographic success and cognitive efflorescence of later Plio-Pleistocene hominids.
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Investigation of features of the IGF 11778 pelvis and lumbar region based on torso preparations and supplemented by other O. bambolii material corrects several crucial interpretations and clarifies the phylogenetic and evolutionary scenarios for this peculiar hominoid.
The Great Divides: Ardipithecus ramidus Reveals the Postcrania of Our Last Common Ancestors with African Apes
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Evidence from Ardipithecus ramidus now suggests that the last common ancestor lacked the hand, foot, pelvic, vertebral, and limb structures and proportions specialized for suspension, vertical climbing, and knuckle-walking among extant African apes.
New hominin fossils from Kanapoi, Kenya, and the mosaic evolution of canine teeth in early hominins
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It is demonstrated that, although canine crown height did not differ between these species, A. anamensis had larger and more dimorphic roots, more like those of extant great apes and Ardipithecus ramidus , than those of A. afarensis .
Origins of Hominin Biocultural Diversity
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A large body of evidence to date, including palaeontological, geological, environmental, archaeological, ecological and biogeographic data allow the reconstruction of the major phases of early hominin evolution, including the onset of biocultural evolution of humans in Africa.
The Evolutionary History of the Australopiths
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  • Biology
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The australopiths were diverse, geographically widespread, and anatomically derived, they lived through periods of pronounced climate change, and their story dominates the narrative of human evolution for millions of years.
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Reexamining Human Origins in Light of Ardipithecus ramidus
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A proposed adaptive suite for the emergence of Ardipithecus from the last common ancestor that the authors shared with chimpanzees accounts for these principal ape/human differences, as well as the marked demographic success and cognitive efflorescence of later Plio-Pleistocene hominids.
Early Pliocene hominids from Gona, Ethiopia
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New Early Pliocene hominid discoveries and their palaeoenvironmental context from the fossiliferous deposits of As Duma, Gona Western Margin (GWM), Afar, Ethiopia are reported.
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TLDR
It is demonstrated that A. afarensis possessed anatomic characteristics that indicate a significant adaptation for movement in the trees, and it is speculated that earlier representatives of the A.Afarensis lineage will present not a combination of arboreal and bipedal traits, but rather the anatomy of a generalized ape.
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New dental and mandibular specimens from three Toros-Menalla fossiliferous localities of the same age are described, including a lower canine consistent with a non-honing C/P3 complex, post-canine teeth with primitive root morphology and intermediate radial enamel thickness, which confirm the morphological differences between S. tchadensis and African apes.
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The combined evidence suggests that Chororapithecus may be a basal member of the gorilla clade, and that the latter exhibited some amount of adaptive and phyletic diversity at around 10–11 Myr ago.
The Great Divides: Ardipithecus ramidus Reveals the Postcrania of Our Last Common Ancestors with African Apes
TLDR
Evidence from Ardipithecus ramidus now suggests that the last common ancestor lacked the hand, foot, pelvic, vertebral, and limb structures and proportions specialized for suspension, vertical climbing, and knuckle-walking among extant African apes.
Macrovertebrate Paleontology and the Pliocene Habitat of Ardipithecus ramidus
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Although the Early Pliocene Afar included a range of environments, and the local environment at Aramis and its vicinity ranged from forests to wooded grasslands, the integration of available physical and biological evidence establishes Ar.
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New hominid specimens from the Middle Awash area of Ethiopia that date to 5.2–5.8 Myr and are associated with a wooded palaeoenvironment are reported, indicating that Ardipithecus was phylogenetically close to the common ancestor of chimpanzees and humans.
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