The developmental relationship between teeth and dermal odontodes in the most primitive bony fish Lophosteus
The ontogenetic trajectory of a marginal jawbone of Lophosteus superbus (Late Silurian, 422 Million years old), the phylogenetically most basal stem osteichthyan, visualized by synchrotron microtomography, reveals a developmental relationship between teeth and dermal odontodes that is not evident fr...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
eLife Sciences Publications Ltd
2020-12-01
|
| Series: | eLife |
| Subjects: | |
| Online Access: | https://elifesciences.org/articles/60985 |
| _version_ | 1811199342376124416 |
|---|---|
| author | Donglei Chen Henning Blom Sophie Sanchez Paul Tafforeau Tiiu Märss Per E Ahlberg |
| author_facet | Donglei Chen Henning Blom Sophie Sanchez Paul Tafforeau Tiiu Märss Per E Ahlberg |
| author_sort | Donglei Chen |
| collection | DOAJ |
| description | The ontogenetic trajectory of a marginal jawbone of Lophosteus superbus (Late Silurian, 422 Million years old), the phylogenetically most basal stem osteichthyan, visualized by synchrotron microtomography, reveals a developmental relationship between teeth and dermal odontodes that is not evident from the adult morphology. The earliest odontodes are two longitudinal founder ridges formed at the ossification center. Subsequent odontodes that are added lingually to the ridges turn into conical teeth and undergo cyclic replacement, while those added labially achieve a stellate appearance. Stellate odontodes deposited directly on the bony plate are aligned with the alternate files of teeth, whereas new tooth positions are inserted into the files of sequential addition when a gap appears. Successive teeth and overgrowing odontodes show hybrid morphologies around the oral-dermal boundary, suggesting signal cross-communication. We propose that teeth and dermal odontodes are modifications of a single system, regulated and differentiated by the oral and dermal epithelia. |
| first_indexed | 2024-04-12T01:46:30Z |
| format | Article |
| id | doaj.art-c79cc69e960b4a6b8aa051680ae111df |
| institution | Directory Open Access Journal |
| issn | 2050-084X |
| language | English |
| last_indexed | 2024-04-12T01:46:30Z |
| publishDate | 2020-12-01 |
| publisher | eLife Sciences Publications Ltd |
| record_format | Article |
| series | eLife |
| spelling | doaj.art-c79cc69e960b4a6b8aa051680ae111df2022-12-22T03:53:03ZengeLife Sciences Publications LtdeLife2050-084X2020-12-01910.7554/eLife.60985The developmental relationship between teeth and dermal odontodes in the most primitive bony fish LophosteusDonglei Chen0https://orcid.org/0000-0002-0471-8162Henning Blom1https://orcid.org/0000-0002-1257-0057Sophie Sanchez2https://orcid.org/0000-0002-3611-6836Paul Tafforeau3https://orcid.org/0000-0002-5962-1683Tiiu Märss4Per E Ahlberg5https://orcid.org/0000-0001-9054-2900Department of Organismal Biology, Uppsala University, Uppsala, SwedenDepartment of Organismal Biology, Uppsala University, Uppsala, SwedenDepartment of Organismal Biology, Uppsala University, Uppsala, Sweden; SciLifeLab, Uppsala University, Uppsala, Sweden; European Synchrotron Radiation Facility, Grenoble, FranceEuropean Synchrotron Radiation Facility, Grenoble, FranceEstonian Marine Institute, University of Tartu, Tallinn, EstoniaDepartment of Organismal Biology, Uppsala University, Uppsala, SwedenThe ontogenetic trajectory of a marginal jawbone of Lophosteus superbus (Late Silurian, 422 Million years old), the phylogenetically most basal stem osteichthyan, visualized by synchrotron microtomography, reveals a developmental relationship between teeth and dermal odontodes that is not evident from the adult morphology. The earliest odontodes are two longitudinal founder ridges formed at the ossification center. Subsequent odontodes that are added lingually to the ridges turn into conical teeth and undergo cyclic replacement, while those added labially achieve a stellate appearance. Stellate odontodes deposited directly on the bony plate are aligned with the alternate files of teeth, whereas new tooth positions are inserted into the files of sequential addition when a gap appears. Successive teeth and overgrowing odontodes show hybrid morphologies around the oral-dermal boundary, suggesting signal cross-communication. We propose that teeth and dermal odontodes are modifications of a single system, regulated and differentiated by the oral and dermal epithelia.https://elifesciences.org/articles/60985dental ontogenybony fishSilurianodontodeorigin of teethsynchrotron |
| spellingShingle | Donglei Chen Henning Blom Sophie Sanchez Paul Tafforeau Tiiu Märss Per E Ahlberg The developmental relationship between teeth and dermal odontodes in the most primitive bony fish Lophosteus eLife dental ontogeny bony fish Silurian odontode origin of teeth synchrotron |
| title | The developmental relationship between teeth and dermal odontodes in the most primitive bony fish Lophosteus |
| title_full | The developmental relationship between teeth and dermal odontodes in the most primitive bony fish Lophosteus |
| title_fullStr | The developmental relationship between teeth and dermal odontodes in the most primitive bony fish Lophosteus |
| title_full_unstemmed | The developmental relationship between teeth and dermal odontodes in the most primitive bony fish Lophosteus |
| title_short | The developmental relationship between teeth and dermal odontodes in the most primitive bony fish Lophosteus |
| title_sort | developmental relationship between teeth and dermal odontodes in the most primitive bony fish lophosteus |
| topic | dental ontogeny bony fish Silurian odontode origin of teeth synchrotron |
| url | https://elifesciences.org/articles/60985 |
| work_keys_str_mv | AT dongleichen thedevelopmentalrelationshipbetweenteethanddermalodontodesinthemostprimitivebonyfishlophosteus AT henningblom thedevelopmentalrelationshipbetweenteethanddermalodontodesinthemostprimitivebonyfishlophosteus AT sophiesanchez thedevelopmentalrelationshipbetweenteethanddermalodontodesinthemostprimitivebonyfishlophosteus AT paultafforeau thedevelopmentalrelationshipbetweenteethanddermalodontodesinthemostprimitivebonyfishlophosteus AT tiiumarss thedevelopmentalrelationshipbetweenteethanddermalodontodesinthemostprimitivebonyfishlophosteus AT pereahlberg thedevelopmentalrelationshipbetweenteethanddermalodontodesinthemostprimitivebonyfishlophosteus AT dongleichen developmentalrelationshipbetweenteethanddermalodontodesinthemostprimitivebonyfishlophosteus AT henningblom developmentalrelationshipbetweenteethanddermalodontodesinthemostprimitivebonyfishlophosteus AT sophiesanchez developmentalrelationshipbetweenteethanddermalodontodesinthemostprimitivebonyfishlophosteus AT paultafforeau developmentalrelationshipbetweenteethanddermalodontodesinthemostprimitivebonyfishlophosteus AT tiiumarss developmentalrelationshipbetweenteethanddermalodontodesinthemostprimitivebonyfishlophosteus AT pereahlberg developmentalrelationshipbetweenteethanddermalodontodesinthemostprimitivebonyfishlophosteus |