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Peramorphosis, an evolutionary developmental mechanism in neotropical bat skull diversity
Jasmin Camacho1, Alexander Heyde1, Bhart-Anjan S Bhullar1,2
1Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, Massachusetts.
Summary
Evolutionary developmental processes, specifically peramorphosis, shaped skull diversity in neotropical leaf-nosed bats. These changes in craniofacial development allowed for specialized feeding adaptations in these mammals.
Area of Science:
- Evolutionary biology
- Developmental biology
- Mammalogy
Background:
- Neotropical leaf-nosed bats (Phyllostomidae) exhibit significant craniofacial diversity linked to specialized diets.
- Skull shape evolution in bats is driven by alterations in craniofacial development.
Purpose of the Study:
- To investigate the evolutionary developmental mechanisms underlying craniofacial modifications in phyllostomid bats.
- To compare ontogenetic and evolutionary trajectories of skull development.
Main Methods:
- Utilized three-dimensional geometric morphometrics.
- Quantified and compared morphological changes during bat evolution and development.
- Analyzed ontogenetic and evolutionary trajectories of the craniofacial skeleton.
Main Results:
- Identified two distinct evolutionary developmental growth processes: acceleration and hypermorphosis.
- Demonstrated that changes in cranial development contribute to craniofacial evolution in bats.
- Linked skull morphogenesis modifications to these developmental processes.
Conclusions:
- Findings support a role for peramorphosis (a type of heterochrony) in the evolution of bat dietary specialists.
- Craniofacial development and evolutionary processes are intertwined in shaping bat diversity.
- Heterochrony provides a framework for understanding adaptation in phyllostomid bats.
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