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Developmental integration in a functional unit: deciphering processes from adult dental morphology
Gaëlle Labonne1, Nicolas Navarro, Rémi Laffont
1Laboratoire PALEVO, Ecole Pratique des Hautes Etudes, 6 bd Gabriel, Dijon, France; UMR uB/CNRS 6282-Biogéosciences, Université de Bourgogne, 6 bd Gabriel, Dijon, France.
Evolution & Development
|July 22, 2014
Summary
Mammalian tooth evolution shows integrated patterns, revealing how development and function shape dental structures. This study deciphers these complex integration patterns in vole dentition.
Area of Science:
- Evolutionary biology
- Developmental biology
- Functional morphology
Background:
- Mammalian dentition evolution is influenced by functional needs and interconnected morphological structures.
- Efficient chewing relies on coordinated tooth development and movement, involving covariation (integration).
Purpose of the Study:
- To investigate the modular organization and integration patterns within the highly derived vole dentition.
- To identify potential dental modules and their functional and developmental origins.
Main Methods:
- Geometric morphometrics was employed to analyze integration patterns.
- Covariation within and between upper and lower molar rows was assessed.
Main Results:
- The study found integrated adult dentition patterns supporting both developmental and functional aspects.
- Integration patterns between opposing molar pairs suggest a transient role for specific molars during chewing.
- Observed integration contradicts existing developmental models, highlighting the influence of early growth stages.
Conclusions:
- Vole dentition exhibits coherent upper and lower molar units, but their integration differs from current developmental theories.
- Early developmental architecture, though masked by later growth, can be inferred from adult phenotypes.
- Understanding these integration patterns is crucial for deciphering mammalian tooth evolution.
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