Cargando…
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...
Autor principal: | |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2014
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4245229/ https://www.ncbi.nlm.nih.gov/pubmed/25426851 http://dx.doi.org/10.1371/journal.pone.0113904 |
_version_ | 1782346337247821824 |
---|---|
author | Heritage, Steven |
author_facet | Heritage, Steven |
author_sort | Heritage, Steven |
collection | PubMed |
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. |
format | Online Article Text |
id | pubmed-4245229 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-42452292014-12-05 Modeling Olfactory Bulb Evolution through Primate Phylogeny Heritage, Steven PLoS One Research Article 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. Public Library of Science 2014-11-26 /pmc/articles/PMC4245229/ /pubmed/25426851 http://dx.doi.org/10.1371/journal.pone.0113904 Text en © 2014 Steven Heritage http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Heritage, Steven Modeling Olfactory Bulb Evolution through Primate Phylogeny |
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 |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4245229/ https://www.ncbi.nlm.nih.gov/pubmed/25426851 http://dx.doi.org/10.1371/journal.pone.0113904 |
work_keys_str_mv | AT heritagesteven modelingolfactorybulbevolutionthroughprimatephylogeny |