dc.contributor.author |
Allen, Kari L |
|
dc.contributor.author |
Cooke, Siobhán B |
|
dc.contributor.author |
Gonzales, Lauren A |
|
dc.contributor.author |
Kay, Richard F |
|
dc.coverage.spatial |
United States |
|
dc.date.accessioned |
2015-10-26T15:07:58Z |
|
dc.date.issued |
2015 |
|
dc.identifier |
http://www.ncbi.nlm.nih.gov/pubmed/25738266 |
|
dc.identifier |
PONE-D-14-20690 |
|
dc.identifier.uri |
https://hdl.handle.net/10161/10781 |
|
dc.description.abstract |
The correlation between diet and dental topography is of importance to paleontologists
seeking to diagnose ecological adaptations in extinct taxa. Although the subject is
well represented in the literature, few studies directly compare methods or evaluate
dietary signals conveyed by both upper and lower molars. Here, we address this gap
in our knowledge by comparing the efficacy of three measures of functional morphology
for classifying an ecologically diverse sample of thirteen medium- to large-bodied
platyrrhines by diet category (e.g., folivore, frugivore, hard object feeder). We
used Shearing Quotient (SQ), an index derived from linear measurements of molar cutting
edges and two indices of crown surface topography, Occlusal Relief (OR) and Relief
Index (RFI). Using SQ, OR, and RFI, individuals were then classified by dietary category
using Discriminate Function Analysis. Both upper and lower molar variables produce
high classification rates in assigning individuals to diet categories, but lower molars
are consistently more successful. SQs yield the highest classification rates. RFI
and OR generally perform above chance. Upper molar RFI has a success rate below the
level of chance. Adding molar length enhances the discriminatory power for all variables.
We conclude that upper molar SQs are useful for dietary reconstruction, especially
when combined with body size information. Additionally, we find that among our sample
of platyrrhines, SQ remains the strongest predictor of diet, while RFI is less useful
at signaling dietary differences in absence of body size information. The study demonstrates
new ways for inferring the diets of extinct platyrrhine primates when both upper and
lower molars are available, or, for taxa known only from upper molars. The techniques
are useful in reconstructing diet in stem representatives of anthropoid clade, who
share key aspects of molar morphology with extant platyrrhines.
|
|
dc.language |
eng |
|
dc.publisher |
Public Library of Science (PLoS) |
|
dc.relation.ispartof |
PLoS One |
|
dc.relation.isversionof |
10.1371/journal.pone.0118732 |
|
dc.subject |
Animals |
|
dc.subject |
Biological Evolution |
|
dc.subject |
Biomechanical Phenomena |
|
dc.subject |
Diet |
|
dc.subject |
Imaging, Three-Dimensional |
|
dc.subject |
Molar |
|
dc.subject |
Paleontology |
|
dc.subject |
Phylogeny |
|
dc.subject |
Platyrrhini |
|
dc.title |
Dietary inference from upper and lower molar morphology in platyrrhine primates. |
|
dc.type |
Journal article |
|
duke.contributor.id |
Kay, Richard F|0098912 |
|
pubs.author-url |
http://www.ncbi.nlm.nih.gov/pubmed/25738266 |
|
pubs.begin-page |
e0118732 |
|
pubs.issue |
3 |
|
pubs.organisational-group |
Duke |
|
pubs.organisational-group |
Earth and Ocean Sciences |
|
pubs.organisational-group |
Evolutionary Anthropology |
|
pubs.organisational-group |
Nicholas School of the Environment |
|
pubs.organisational-group |
Trinity College of Arts & Sciences |
|
pubs.publication-status |
Published online |
|
pubs.volume |
10 |
|
dc.identifier.eissn |
1932-6203 |
|
duke.contributor.orcid |
Kay, Richard F|0000-0002-4219-7580 |
|