Journal article
Fluctuations in Evolutionary Integration Allow for Big Brains and Disparate Faces
Scientific reports, Vol.7(1), p.40431
01/16/2017
DOI: 10.1038/srep40431
PMCID: PMC5238424
PMID: 28091543
Abstract
In theory, evolutionary modularity allows anatomical structures to respond differently to selective regimes, thus promoting morphological diversification. These differences can then influence the rate and direction of phenotypic evolution among structures. Here we use geometric morphometrics and phenotypic matrix statistics to compare rates of craniofacial evolution and estimate evolvability in the face and braincase modules of a clade of teleost fishes (Gymnotiformes) and a clade of mammals (Carnivora), both of which exhibit substantial craniofacial diversity. We find that the face and braincase regions of both clades display different degrees of integration. We find that the face and braincase evolve at similar rates in Gymnotiformes and the reverse in Carnivora with the braincase evolving twice as fast as the face. Estimates of evolvability and constraints in these modules suggest differential responses to selection arising from fluctuations in phylogenetic integration, thus influencing differential rates of skull-shape evolution in these two clades.
Details
- Title: Subtitle
- Fluctuations in Evolutionary Integration Allow for Big Brains and Disparate Faces
- Creators
- Kory M. Evans - University of Louisiana at LafayetteBrandon T. Waltz - University of Louisiana at LafayetteVictor A. Tagliacollo - Universidade Federal do TocantinsBrian L. Sidlauskas - Oregon State UniversityJames S. Albert - University of Louisiana at Lafayette
- Resource Type
- Journal article
- Publication Details
- Scientific reports, Vol.7(1), p.40431
- DOI
- 10.1038/srep40431
- PMID
- 28091543
- PMCID
- PMC5238424
- NLM abbreviation
- Sci Rep
- ISSN
- 2045-2322
- eISSN
- 2045-2322
- Publisher
- Nature Publishing Group
- Language
- English
- Date published
- 01/16/2017
- Academic Unit
- Biology
- Record Identifier
- 9984936506202771
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