Modeling olfactory bulb evolution through primate phylogeny.
Adaptive characterizations of primates have usually included a reduction in olfactory sensitivity. However, this inference of derivation and directionality assumes an ancestral state of olfaction, usually by comparison to a group of extant non-primate mammals. Thus, the accuracy of the inference dep...
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2014-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC4245229?pdf=render |
| _version_ | 1818897982415699968 |
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| author | Steven Heritage |
| author_facet | Steven Heritage |
| author_sort | Steven Heritage |
| collection | DOAJ |
| description | Adaptive characterizations of primates have usually included a reduction in olfactory sensitivity. However, this inference of derivation and directionality assumes an ancestral state of olfaction, usually by comparison to a group of extant non-primate mammals. Thus, the accuracy of the inference depends on the assumed ancestral state. Here I present a phylogenetic model of continuous trait evolution that reconstructs olfactory bulb volumes for ancestral nodes of primates and mammal outgroups. Parent-daughter comparisons suggest that, relative to the ancestral euarchontan, the crown-primate node is plesiomorphic and that derived reduction in olfactory sensitivity is an attribute of the haplorhine lineage. The model also suggests a derived increase in olfactory sensitivity at the strepsirrhine node. This oppositional diversification of the strepsirrhine and haplorhine lineages from an intermediate and non-derived ancestor is inconsistent with a characterization of graded reduction through primate evolution. |
| first_indexed | 2024-12-19T19:24:49Z |
| format | Article |
| id | doaj.art-da21bc1d1ef441d3a846c9519289a2d7 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-19T19:24:49Z |
| publishDate | 2014-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-da21bc1d1ef441d3a846c9519289a2d72022-12-21T20:08:49ZengPublic Library of Science (PLoS)PLoS ONE1932-62032014-01-01911e11390410.1371/journal.pone.0113904Modeling olfactory bulb evolution through primate phylogeny.Steven HeritageAdaptive characterizations of primates have usually included a reduction in olfactory sensitivity. However, this inference of derivation and directionality assumes an ancestral state of olfaction, usually by comparison to a group of extant non-primate mammals. Thus, the accuracy of the inference depends on the assumed ancestral state. Here I present a phylogenetic model of continuous trait evolution that reconstructs olfactory bulb volumes for ancestral nodes of primates and mammal outgroups. Parent-daughter comparisons suggest that, relative to the ancestral euarchontan, the crown-primate node is plesiomorphic and that derived reduction in olfactory sensitivity is an attribute of the haplorhine lineage. The model also suggests a derived increase in olfactory sensitivity at the strepsirrhine node. This oppositional diversification of the strepsirrhine and haplorhine lineages from an intermediate and non-derived ancestor is inconsistent with a characterization of graded reduction through primate evolution.http://europepmc.org/articles/PMC4245229?pdf=render |
| spellingShingle | Steven Heritage Modeling olfactory bulb evolution through primate phylogeny. PLoS ONE |
| title | Modeling olfactory bulb evolution through primate phylogeny. |
| title_full | Modeling olfactory bulb evolution through primate phylogeny. |
| title_fullStr | Modeling olfactory bulb evolution through primate phylogeny. |
| title_full_unstemmed | Modeling olfactory bulb evolution through primate phylogeny. |
| title_short | Modeling olfactory bulb evolution through primate phylogeny. |
| title_sort | modeling olfactory bulb evolution through primate phylogeny |
| url | http://europepmc.org/articles/PMC4245229?pdf=render |
| work_keys_str_mv | AT stevenheritage modelingolfactorybulbevolutionthroughprimatephylogeny |