New specimens and confirmation of an early age for Australopithecus anamensis

@article{Leakey1998NewSA,
  title={New specimens and confirmation of an early age for Australopithecus anamensis},
  author={Meave G. Leakey and Craig S. Feibel and Ian Mcdougall and Carol V. Ward and Alan W. Walker},
  journal={Nature},
  year={1998},
  volume={393},
  pages={62-66}
}
The discovery of Australopithecus anamensis fossils from strata lying between tephra dated at 4.17 and 4.12 million years ago, and from slightly higher strata not well constrained in age by overlying dated units, provoked the claim that more than one species might be represented: it was suggested that the stratigraphically higher fossils, which include the important tibia, humerus and a large, presumed male, mandible (KNM-KP 29287), might belong to a later, more derived hominid. We have… Expand
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Nine new Kanapoi hominin fossils support the observation that canine crown height, morphology, root size and dimorphism were not altered from a primitive ape-like condition as part of a single event in human evolution, and that there may have been an adaptive difference in canine function between A. anamensis and A.afarensis. Expand
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Morphology of Australopithecus anamensis from Kanapoi and Allia Bay, Kenya.
TLDR
Based on the limited postcranial evidence available, A. anamensis appears to have been habitually bipedal, although it retained some primitive features of its upper limbs, and there appears to be no autapomorphies precluding A.Anamensis from ancestry of A. afarensis. Expand
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TLDR
The discovery and naming of A. afarensis coincided with important developments in theory and methodology in paleoanthropology; in addition, important fossil and genetic discoveries were changing expectations about hominin divergence dates from extant African apes. Expand
The environments of Australopithecus anamensis at Allia Bay, Kenya: A multiproxy analysis of early Pliocene Bovidae.
TLDR
Dietary reconstructions based on stable isotopes, mesowear, and hypsodonty reveal that these bovids' diet encompassed the full C3 to C4 dietary spectrum and overlap in the two data sets, allowing reconstructions of the paleoenvironments of A. anamensis to be extended to Allia Bay, where this pivotal hominin species is associated with heterogeneous settings. Expand
Asa Issie, Aramis and the origin of
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New fossils from the Middle Awash study area that extend the known Au. Expand
New fossils of Australopithecus anamensis from Kanapoi, West Turkana, Kenya (2012-2015).
TLDR
18 new fossils attributable to Australopithecus anamensis are yielded, including the second maxillary fragment known from a Kanapoi hominin and the first from a relatively young adult, and two new complete sets of mandibular incisors are notably large. Expand
Was Australopithecus anamensis ancestral to A. afarensis? A case of anagenesis in the hominin fossil record.
TLDR
A phylogenetic analysis of four temporally successive fossil samples assigned to these species using polarized character-state data from 20 morphological characters of the dentition and jaws supports the idea that the A. anamensis and A. afarensis samples represent parts of an anagenetically evolving lineage, or evolutionary species. Expand
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