Document Detail

Paleobiological implications of the Ardipithecus ramidus dentition.
MedLine Citation:
PMID:  19810195     Owner:  NLM     Status:  MEDLINE    
The Middle Awash Ardipithecus ramidus sample comprises over 145 teeth, including associated maxillary and mandibular sets. These help reveal the earliest stages of human evolution. Ar. ramidus lacks the postcanine megadontia of Australopithecus. Its molars have thinner enamel and are functionally less durable than those of Australopithecus but lack the derived Pan pattern of thin occlusal enamel associated with ripe-fruit frugivory. The Ar. ramidus dental morphology and wear pattern are consistent with a partially terrestrial, omnivorous/frugivorous niche. Analyses show that the ARA-VP-6/500 skeleton is female and that Ar. ramidus was nearly monomorphic in canine size and shape. The canine/lower third premolar complex indicates a reduction of canine size and honing capacity early in hominid evolution, possibly driven by selection targeted on the male upper canine.
Gen Suwa; Reiko T Kono; Scott W Simpson; Berhane Asfaw; C Owen Lovejoy; Tim D White
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Science (New York, N.Y.)     Volume:  326     ISSN:  1095-9203     ISO Abbreviation:  Science     Publication Date:  2009 Oct 
Date Detail:
Created Date:  2009-10-06     Completed Date:  2009-10-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  United States    
Other Details:
Languages:  eng     Pagination:  94-9     Citation Subset:  IM    
University Museum, University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-0033 Japan.
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MeSH Terms
Cuspid / anatomy & histology
Dental Enamel / anatomy & histology
Hominidae / anatomy & histology*,  classification
Incisor / anatomy & histology
Molar / anatomy & histology
Sex Characteristics
Tooth / anatomy & histology*
Tooth Crown / anatomy & histology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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