Source:http://linkedlifedata.com/resource/pubmed/id/11920388
Switch to
Predicate | Object |
---|---|
rdf:type | |
lifeskim:mentions | |
pubmed:issue |
4
|
pubmed:dateCreated |
2002-3-28
|
pubmed:abstractText |
The Omo L338y-6 occipital region has been recently studied by White and Falk (1999), who claim that it shows a readily identifiable enlarged left occipital-marginal sinus (O/M). These observations are contrary to the direct observations of previous investigators (Rak and Howell, 1978; Kimbel, 1984; Holloway, 1981; Holloway, 1988). White and Falk (1999) further argue that the presence of this enlarged O/M strongly suggests that the Omo L338y-6 hominid was indeed a "robust" Australopithecus. We used direct sectioning and CT scanning to analyze magnified sections of a high-quality first-generation cast of the newly cleaned original fossil. These methods fail to show any evidence of a morphological landmark that can be interpreted as an enlarged O/M, either as an eminence or a sulcus. In contrast, the same techniques used with both SK 1585 and OH5 ("robust" Australopithecus with an enlarged O/M) show extremely visible and palpable enlarged O/M's. Examination of the original Omo fossil confirms that it lacks an O/M. This evidence clearly shows that an enlarged O/M cannot be identified on either the original fossil or a first-generation cast, although this does not rule out the possibility that the Omo L338y-6 hominid was a "robust" Australopithecus. We believe that the differences between observers regarding this feature are most probably due to displacement caused by a crack and the different source materials employed, i.e., the difference between a first-generation cast of the original fossil and a third- or fourth-generation cast of the endocast made two decades ago.
|
pubmed:commentsCorrections | |
pubmed:language |
eng
|
pubmed:journal | |
pubmed:citationSubset |
IM
|
pubmed:status |
MEDLINE
|
pubmed:month |
Apr
|
pubmed:issn |
0003-276X
|
pubmed:author | |
pubmed:copyrightInfo |
Copyright 2002 Wiley-Liss, Inc.
|
pubmed:issnType |
Print
|
pubmed:day |
1
|
pubmed:volume |
266
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
249-57
|
pubmed:dateRevised |
2010-11-18
|
pubmed:meshHeading |
pubmed-meshheading:11920388-Animals,
pubmed-meshheading:11920388-Anthropology, Physical,
pubmed-meshheading:11920388-Anthropometry,
pubmed-meshheading:11920388-Biological Evolution,
pubmed-meshheading:11920388-Brain,
pubmed-meshheading:11920388-Classification,
pubmed-meshheading:11920388-Cranial Sinuses,
pubmed-meshheading:11920388-Fossils,
pubmed-meshheading:11920388-Hominidae,
pubmed-meshheading:11920388-Humans,
pubmed-meshheading:11920388-Occipital Bone,
pubmed-meshheading:11920388-Tomography Scanners, X-Ray Computed
|
pubmed:year |
2002
|
pubmed:articleTitle |
Missing Omo L338y-6 occipital-marginal sinus drainage pattern: ground sectioning, computer tomography scanning, and the original fossil fail to show it.
|
pubmed:affiliation |
Department of Anthropology, Columbia University, New York, New York 10027, USA. rlh2@columbia.edu
|
pubmed:publicationType |
Journal Article
|