Open Collections

UBC Research Data

Data from: Dental ontogeny in extinct synapsids reveals a complex evolutionary history of the mammalian tooth attachment system LeBlanc, Aaron R.H.; Brink, Kirstin S.; Whitney, Megan R.; Abdala, Fernando; Reisz, Robert R.; LeBlanc, Aaron R. H.

Description

Abstract
The mammalian dentition is uniquely characterized by a combination of precise occlusion, permanent adult teeth, and a unique tooth attachment system. Unlike the ankylosed teeth in most reptiles, mammal teeth are supported by a ligamentous tissue that suspends each tooth in its socket, providing flexible and compliant tooth attachment that prolongs the life of each tooth and maintains occlusal relationships. Here we investigate dental ontogeny through histological examination of a wide range of extinct synapsid lineages to assess whether the ligamentous tooth attachment system is unique to mammals and to determine how it evolved. This study shows for the first time that the ligamentous tooth attachment system is not unique to crown mammals within Synapsida, having arisen in several non-mammalian therapsid clades as a result of neoteny and progenesis in dental ontogeny. Mammalian tooth attachment is here re-interpreted as a paedomorphic condition relative to the ancestral synapsid form of tooth attachment.
Usage notes
Thrinaxodon adult BP/1/7199

Item Metadata

Title	Data from: Dental ontogeny in extinct synapsids reveals a complex evolutionary history of the mammalian tooth attachment system
Creator	LeBlanc, Aaron R.H.; Brink, Kirstin S.; Whitney, Megan R.; Abdala, Fernando; Reisz, Robert R.; LeBlanc, Aaron R. H.
Date Issued	2021-05-19
Description	Abstract The mammalian dentition is uniquely characterized by a combination of precise occlusion, permanent adult teeth, and a unique tooth attachment system. Unlike the ankylosed teeth in most reptiles, mammal teeth are supported by a ligamentous tissue that suspends each tooth in its socket, providing flexible and compliant tooth attachment that prolongs the life of each tooth and maintains occlusal relationships. Here we investigate dental ontogeny through histological examination of a wide range of extinct synapsid lineages to assess whether the ligamentous tooth attachment system is unique to mammals and to determine how it evolved. This study shows for the first time that the ligamentous tooth attachment system is not unique to crown mammals within Synapsida, having arisen in several non-mammalian therapsid clades as a result of neoteny and progenesis in dental ontogeny. Mammalian tooth attachment is here re-interpreted as a paedomorphic condition relative to the ancestral synapsid form of tooth attachment.; Usage notes Thrinaxodon adult BP/1/7199
Subject	Other; dental histology; Triassic; Permian; ankylosis; Galesaurus; Thrinaxodon; pelycosaur; therapsid; paedomorphosis
Type	Dataset
Notes	Dryad version number: 1 Version status: submitted Dryad curation status: Published Sharing link: https://datadryad.org/stash/share/jE-y6lly6JEsXFQwh2K4BOKof822k-zXgJdEL0LY23s</p> Storage size: 792900673 Visibility: public
Date Available	2020-06-24
Provider	University of British Columbia Library
License	CC0 1.0
DOI	10.14288/1.0397847
URI	https://doi.org/10.5683/SP2/OXALMZ
Publisher DOI	https://doi.org/10.5683/SP2/OXALMZ; https://doi.org/10.5061/dryad.v23v5d2
Rights URI	http://creativecommons.org/publicdomain/zero/1.0
Aggregated Source Repository	Dataverse

Item Media

Item Citations and Data

License

CC0 1.0