Testing heterochrony: Connecting skull shape ontogeny and evolution of feeding adaptations in baleen whales
Abstract Ontogeny plays a key role in the evolution of organisms, as changes during the complex processes of development can allow for new traits to arise. Identifying changes in ontogenetic allometry—the relationship between skull shape and size during growth—can reveal the processes underlying maj...
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crwiley:10.1111/ede.12447 2024-06-02T08:04:02+00:00 Testing heterochrony: Connecting skull shape ontogeny and evolution of feeding adaptations in baleen whales Lanzetti, Agnese Portela‐Miguez, Roberto Fernandez, Vincent Goswami, Anjali Horizon 2020 Framework Programme 2023 http://dx.doi.org/10.1111/ede.12447 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ede.12447 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ Evolution & Development volume 25, issue 4-5, page 257-273 ISSN 1520-541X 1525-142X journal-article 2023 crwiley https://doi.org/10.1111/ede.12447 2024-05-03T10:40:21Z Abstract Ontogeny plays a key role in the evolution of organisms, as changes during the complex processes of development can allow for new traits to arise. Identifying changes in ontogenetic allometry—the relationship between skull shape and size during growth—can reveal the processes underlying major evolutionary transformations. Baleen whales (Mysticeti, Cetacea) underwent major morphological changes in transitioning from their ancestral raptorial feeding mode to the three specialized filter‐feeding modes observed in extant taxa. Heterochronic processes have been implicated in the evolution of these feeding modes, and their associated specialized cranial morphologies, but their role has never been tested with quantitative data. Here, we quantified skull shapes ontogeny and reconstructed ancestral allometric trajectories using 3D geometric morphometrics and phylogenetic comparative methods on sample representing modern mysticetes diversity. Our results demonstrate that Mysticeti, while having a common developmental trajectory, present distinct cranial shapes from early in their ontogeny corresponding to their different feeding ecologies. Size is the main driver of shape disparity across mysticetes. Disparate heterochronic processes are evident in the evolution of the group: skim feeders present accelerated growth relative to the ancestral nodes, while Balaenopteridae have overall slower growth, or pedomorphosis. Gray whales are the only taxon with a relatively faster rate of growth in this group, which might be connected to its unique benthic feeding strategy. Reconstructed ancestral allometries and related skull shapes indicate that extinct taxa used less specialized filter‐feeding modes, a finding broadly in line with the available fossil evidence. Article in Journal/Newspaper baleen whales Wiley Online Library Evolution & Development 25 4-5 257 273 |
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English |
description |
Abstract Ontogeny plays a key role in the evolution of organisms, as changes during the complex processes of development can allow for new traits to arise. Identifying changes in ontogenetic allometry—the relationship between skull shape and size during growth—can reveal the processes underlying major evolutionary transformations. Baleen whales (Mysticeti, Cetacea) underwent major morphological changes in transitioning from their ancestral raptorial feeding mode to the three specialized filter‐feeding modes observed in extant taxa. Heterochronic processes have been implicated in the evolution of these feeding modes, and their associated specialized cranial morphologies, but their role has never been tested with quantitative data. Here, we quantified skull shapes ontogeny and reconstructed ancestral allometric trajectories using 3D geometric morphometrics and phylogenetic comparative methods on sample representing modern mysticetes diversity. Our results demonstrate that Mysticeti, while having a common developmental trajectory, present distinct cranial shapes from early in their ontogeny corresponding to their different feeding ecologies. Size is the main driver of shape disparity across mysticetes. Disparate heterochronic processes are evident in the evolution of the group: skim feeders present accelerated growth relative to the ancestral nodes, while Balaenopteridae have overall slower growth, or pedomorphosis. Gray whales are the only taxon with a relatively faster rate of growth in this group, which might be connected to its unique benthic feeding strategy. Reconstructed ancestral allometries and related skull shapes indicate that extinct taxa used less specialized filter‐feeding modes, a finding broadly in line with the available fossil evidence. |
author2 |
Horizon 2020 Framework Programme |
format |
Article in Journal/Newspaper |
author |
Lanzetti, Agnese Portela‐Miguez, Roberto Fernandez, Vincent Goswami, Anjali |
spellingShingle |
Lanzetti, Agnese Portela‐Miguez, Roberto Fernandez, Vincent Goswami, Anjali Testing heterochrony: Connecting skull shape ontogeny and evolution of feeding adaptations in baleen whales |
author_facet |
Lanzetti, Agnese Portela‐Miguez, Roberto Fernandez, Vincent Goswami, Anjali |
author_sort |
Lanzetti, Agnese |
title |
Testing heterochrony: Connecting skull shape ontogeny and evolution of feeding adaptations in baleen whales |
title_short |
Testing heterochrony: Connecting skull shape ontogeny and evolution of feeding adaptations in baleen whales |
title_full |
Testing heterochrony: Connecting skull shape ontogeny and evolution of feeding adaptations in baleen whales |
title_fullStr |
Testing heterochrony: Connecting skull shape ontogeny and evolution of feeding adaptations in baleen whales |
title_full_unstemmed |
Testing heterochrony: Connecting skull shape ontogeny and evolution of feeding adaptations in baleen whales |
title_sort |
testing heterochrony: connecting skull shape ontogeny and evolution of feeding adaptations in baleen whales |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/ede.12447 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ede.12447 |
genre |
baleen whales |
genre_facet |
baleen whales |
op_source |
Evolution & Development volume 25, issue 4-5, page 257-273 ISSN 1520-541X 1525-142X |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1111/ede.12447 |
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Evolution & Development |
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25 |
container_issue |
4-5 |
container_start_page |
257 |
op_container_end_page |
273 |
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1800748660995129344 |