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The stem osteichthy...
The stem osteichthyan Andreolepis and the origin of tooth replacement
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- Chen, Donglei (författare)
- Uppsala universitet,Evolution och utvecklingsbiologi
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- Blom, Henning (författare)
- Uppsala universitet,Evolution och utvecklingsbiologi
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- Sanchez, Sophie (författare)
- Uppsala universitet,Evolution och utvecklingsbiologi,Science for Life Laboratory, SciLifeLab,European Synchrotron Radiat Facil, 6 Rue Jules Horowitz, F-38043 Grenoble, France.
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- Tafforeau, Paul (författare)
- European Synchrotron Radiat Facil, 6 Rue Jules Horowitz, F-38043 Grenoble, France.
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- Ahlberg, Per (författare)
- Uppsala universitet,Evolution och utvecklingsbiologi,Science for Life Laboratory, SciLifeLab
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(creator_code:org_t)
- 2016-10-17
- 2016
- Engelska.
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Ingår i: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 539:7628, s. 237-
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The teeth of gnathostomes (jawed vertebrates) show rigidly patterned, unidirectional replacement that may or may not be associated with a shedding mechanism. These mechanisms, which are critical for the maintenance of the dentition, are incongruently distributed among extant gnathostomes. Although a permanent tooth-generating dental lamina is present in all chondrichthyans, many tetrapods and some teleosts, it is absent in the non-teleost actinopterygians. Tooth-shedding by basal hard tissue resorption occurs in most osteichthyans (including tetrapods) but not in chondrichthyans. Here we report a three-dimensional virtual dissection of the dentition of a 424-million-year-old stem osteichthyan, Andreolepis hedei, using propagation phase-contrast synchrotron microtomography, with a reconstruction of its growth history. Andreolepis, close to the common ancestor of all extant osteichthyans, shed its teeth by basal resorption but probably lacked a permanent dental lamina. This is the earliest documented instance of resorptive tooth shedding and may represent the primitive osteichthyan mode of tooth replacement.
Ämnesord
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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