Dental replacement in Mesozoic birds: evidence from newly discovered Brazilian enantiornithines
Polyphyodonty—multiple tooth generations—in Mesozoic birds has been confirmed since the nineteenth century. Their dental cycle had been assessed through sparse data from tooth roots revealed through broken jawbones and disattached teeth. However, detailed descriptions of their tooth cycling are lack...
| Autores: | ; ; ; ; |
|---|---|
| Tipo de documento: | Artículo |
| Estado: | Published version |
| Fecha de publicación: | 2021 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/148800 |
| Acceso en línea: | http://hdl.handle.net/11336/148800 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | CRETACICO TOOTH REPLACEMENT AVES ENANTIORNITHINES https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
| _version_ | 1878403429745819648 |
|---|---|
| author | Wu, Yun Hsin |
| author2 | Chiappe, Luis M. Bottjer, David J. Nava, William Martinelli, Agustín Guillermo |
| author2_role | author author author author |
| author_browse | Bottjer, David J. Chiappe, Luis M. Martinelli, Agustín Guillermo Nava, William Wu, Yun Hsin |
| author_facet | Wu, Yun Hsin Chiappe, Luis M. Bottjer, David J. Nava, William Martinelli, Agustín Guillermo |
| author_role | author |
| collection | CONICET Digital (CONICET) |
| description | Polyphyodonty—multiple tooth generations—in Mesozoic birds has been confirmed since the nineteenth century. Their dental cycle had been assessed through sparse data from tooth roots revealed through broken jawbones and disattached teeth. However, detailed descriptions of their tooth cycling are lacking, and the specifics of their replacement patterns remain largely unknown. Here we present unprecedented µCT data from three enantiornithine specimens from the Upper Cretaceous of southeastern Brazil. The high resolution µCT data show an alternating dental replacement pattern in the premaxillae, consistent with the widespread pattern amongst extinct and extant reptiles. The dentary also reveals dental replacement at different stages. These results strongly suggest that an alternating pattern was typical of enantiornithine birds. µCT data show that new teeth start lingually within the alveoli, resorb roots of functional teeth and migrate labially into their pulp cavities at an early stage, similar to modern crocodilians. Our results imply that the control mechanism for tooth cycling is conserved during the transition between non-avian reptiles and birds. These first 3D reconstructions of enantiornithine dental replacement demonstrate that 3D data are essential to understand the evolution and deep homology of archosaurian tooth cycling. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | AR_7cfdc8c8a5600f0075937f7059f4fdce |
| identifier_str_mv | Wu, Yun Hsin; Chiappe, Luis M.; Bottjer, David J.; Nava, William; Martinelli, Agustín Guillermo; Dental replacement in Mesozoic birds: evidence from newly discovered Brazilian enantiornithines; Nature; Scientific Reports; 11; 1; 9-2021; 1-12 2045-2322 CONICET Digital CONICET |
| institution | Consejo Nacional de Investigaciones Científicas y Técnicas |
| instname_str | Consejo Nacional de Investigaciones Científicas y Técnicas |
| language | eng |
| network_acronym_str | AR |
| network_name_str | Argentina |
| oai_identifier_str | oai:ri.conicet.gov.ar:11336/148800 |
| publishDate | 2021 |
| publishDateSort | 2021 |
| publisher | Nature |
| publisherStr | Nature |
| reponame_str | CONICET Digital (CONICET) |
| spelling | Dental replacement in Mesozoic birds: evidence from newly discovered Brazilian enantiornithines Wu, Yun Hsin Chiappe, Luis M. Bottjer, David J. Nava, William Martinelli, Agustín Guillermo CRETACICO TOOTH REPLACEMENT AVES ENANTIORNITHINES https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Polyphyodonty—multiple tooth generations—in Mesozoic birds has been confirmed since the nineteenth century. Their dental cycle had been assessed through sparse data from tooth roots revealed through broken jawbones and disattached teeth. However, detailed descriptions of their tooth cycling are lacking, and the specifics of their replacement patterns remain largely unknown. Here we present unprecedented µCT data from three enantiornithine specimens from the Upper Cretaceous of southeastern Brazil. The high resolution µCT data show an alternating dental replacement pattern in the premaxillae, consistent with the widespread pattern amongst extinct and extant reptiles. The dentary also reveals dental replacement at different stages. These results strongly suggest that an alternating pattern was typical of enantiornithine birds. µCT data show that new teeth start lingually within the alveoli, resorb roots of functional teeth and migrate labially into their pulp cavities at an early stage, similar to modern crocodilians. Our results imply that the control mechanism for tooth cycling is conserved during the transition between non-avian reptiles and birds. These first 3D reconstructions of enantiornithine dental replacement demonstrate that 3D data are essential to understand the evolution and deep homology of archosaurian tooth cycling. Fil: Wu, Yun Hsin. University of Southern California; Estados Unidos. University of Southern California; Estados Unidos Fil: Chiappe, Luis M.. Natural History Museum of Los Angeles County; Estados Unidos Fil: Bottjer, David J.. University of Southern California; Estados Unidos. University of Southern California; Estados Unidos Fil: Nava, William. Museu de Paleontologia de Marília; Brasil Fil: Martinelli, Agustín Guillermo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina Nature http://hdl.handle.net/11336/148800 Wu, Yun Hsin; Chiappe, Luis M.; Bottjer, David J.; Nava, William; Martinelli, Agustín Guillermo; Dental replacement in Mesozoic birds: evidence from newly discovered Brazilian enantiornithines; Nature; Scientific Reports; 11; 1; 9-2021; 1-12 2045-2322 CONICET Digital CONICET |
| spellingShingle | Dental replacement in Mesozoic birds: evidence from newly discovered Brazilian enantiornithines Wu, Yun Hsin CRETACICO TOOTH REPLACEMENT AVES ENANTIORNITHINES https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
| status_str | publishedVersion |
| title | Dental replacement in Mesozoic birds: evidence from newly discovered Brazilian enantiornithines |
| title_full | Dental replacement in Mesozoic birds: evidence from newly discovered Brazilian enantiornithines |
| title_fullStr | Dental replacement in Mesozoic birds: evidence from newly discovered Brazilian enantiornithines |
| title_full_unstemmed | Dental replacement in Mesozoic birds: evidence from newly discovered Brazilian enantiornithines |
| title_short | Dental replacement in Mesozoic birds: evidence from newly discovered Brazilian enantiornithines |
| title_sort | Dental replacement in Mesozoic birds: evidence from newly discovered Brazilian enantiornithines |
| topic | CRETACICO TOOTH REPLACEMENT AVES ENANTIORNITHINES https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
| topic_facet | CRETACICO TOOTH REPLACEMENT AVES ENANTIORNITHINES https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
| url | http://hdl.handle.net/11336/148800 |