Wear patterns and dental functioning in an Early Cretaceous stegosaur from Yakutia, Eastern Russia
Isolated stegosaurian teeth from the Early Cretaceous high-latitude (palaeolatitude estimate of N 62°- 66.5°) Teete locality in Yakutia (Eastern Siberia, Russia) are characterized by a labiolingually compressed, slightly asymmetrical and mesiodistally denticulated (9–14 denticles) crown, a pronounce...
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crplos:10.1371/journal.pone.0248163 2024-09-15T18:40:54+00:00 Wear patterns and dental functioning in an Early Cretaceous stegosaur from Yakutia, Eastern Russia Skutschas, Pavel P. Gvozdkova, Vera A. Averianov, Alexander O. Lopatin, Alexey V. Martin, Thomas Schellhorn, Rico Kolosov, Petr N. Markova, Valentina D. Kolchanov, Veniamin V. Grigoriev, Dmitry V. Kuzmin, Ivan T. Vitenko, Dmitry D. Pardo-Pérez, Judith Российский Фонд Фундаментальных Исследований Deutsche Forschungsgemeinschaft 2021 http://dx.doi.org/10.1371/journal.pone.0248163 https://dx.plos.org/10.1371/journal.pone.0248163 en eng Public Library of Science (PLoS) http://creativecommons.org/licenses/by/4.0/ PLOS ONE volume 16, issue 3, page e0248163 ISSN 1932-6203 journal-article 2021 crplos https://doi.org/10.1371/journal.pone.0248163 2024-07-09T04:07:25Z Isolated stegosaurian teeth from the Early Cretaceous high-latitude (palaeolatitude estimate of N 62°- 66.5°) Teete locality in Yakutia (Eastern Siberia, Russia) are characterized by a labiolingually compressed, slightly asymmetrical and mesiodistally denticulated (9–14 denticles) crown, a pronounced ring-like cingulum, as well as a “complex network of secondary ridges”. The 63 teeth (found during on-site excavation in 2012, 2017–2019 and screen-washing in 2017–2019) most likely belong to one species of a derived (stegosaurine) stegosaur. Most of the teeth exhibit a high degree of wear and up to three wear facets has been observed on a single tooth. The prevalence of worn teeth with up to three wear facets and the presence of different types of facets (including steeply inclined and groove-like) indicate the tooth-tooth contact and precise dental occlusion in the Teete stegosaur. The microwear pattern (mesiodistally or slightly obliquely oriented scratches; differently oriented straight and curved scratches on some wear facets) suggest a complex jaw mechanism with palinal jaw motion. Histological analysis revealed that the Teete stegosaur is characterized by relatively short tooth formation time (95 days) and the presence of a “wavy enamel pattern”. Discoveries of a “wavy enamel pattern” in the Teete stegosaur, in a Middle Jurassic stegosaur from Western Siberia, and in the basal ceratopsian Psittacosaurus , suggest that this histological feature is common for different ornithischian clades, including ornithopods, marginocephalians, and thyreophorans. A juvenile tooth in the Teete sample indicates that stegosaurs were year-round residents and reproduced in high latitudes. The combination of high degree of tooth wear with formation of multiple wear facets, complex jaw motions, relatively short tooth formation time and possibly high tooth replacement rates is interpreted as a special adaptation for a life in high-latitude conditions or, alternatively, as a common stegosaurian adaptation making stegosaurs a ... Article in Journal/Newspaper Yakutia Siberia PLOS PLOS ONE 16 3 e0248163 |
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English |
description |
Isolated stegosaurian teeth from the Early Cretaceous high-latitude (palaeolatitude estimate of N 62°- 66.5°) Teete locality in Yakutia (Eastern Siberia, Russia) are characterized by a labiolingually compressed, slightly asymmetrical and mesiodistally denticulated (9–14 denticles) crown, a pronounced ring-like cingulum, as well as a “complex network of secondary ridges”. The 63 teeth (found during on-site excavation in 2012, 2017–2019 and screen-washing in 2017–2019) most likely belong to one species of a derived (stegosaurine) stegosaur. Most of the teeth exhibit a high degree of wear and up to three wear facets has been observed on a single tooth. The prevalence of worn teeth with up to three wear facets and the presence of different types of facets (including steeply inclined and groove-like) indicate the tooth-tooth contact and precise dental occlusion in the Teete stegosaur. The microwear pattern (mesiodistally or slightly obliquely oriented scratches; differently oriented straight and curved scratches on some wear facets) suggest a complex jaw mechanism with palinal jaw motion. Histological analysis revealed that the Teete stegosaur is characterized by relatively short tooth formation time (95 days) and the presence of a “wavy enamel pattern”. Discoveries of a “wavy enamel pattern” in the Teete stegosaur, in a Middle Jurassic stegosaur from Western Siberia, and in the basal ceratopsian Psittacosaurus , suggest that this histological feature is common for different ornithischian clades, including ornithopods, marginocephalians, and thyreophorans. A juvenile tooth in the Teete sample indicates that stegosaurs were year-round residents and reproduced in high latitudes. The combination of high degree of tooth wear with formation of multiple wear facets, complex jaw motions, relatively short tooth formation time and possibly high tooth replacement rates is interpreted as a special adaptation for a life in high-latitude conditions or, alternatively, as a common stegosaurian adaptation making stegosaurs a ... |
author2 |
Pardo-Pérez, Judith Российский Фонд Фундаментальных Исследований Deutsche Forschungsgemeinschaft |
format |
Article in Journal/Newspaper |
author |
Skutschas, Pavel P. Gvozdkova, Vera A. Averianov, Alexander O. Lopatin, Alexey V. Martin, Thomas Schellhorn, Rico Kolosov, Petr N. Markova, Valentina D. Kolchanov, Veniamin V. Grigoriev, Dmitry V. Kuzmin, Ivan T. Vitenko, Dmitry D. |
spellingShingle |
Skutschas, Pavel P. Gvozdkova, Vera A. Averianov, Alexander O. Lopatin, Alexey V. Martin, Thomas Schellhorn, Rico Kolosov, Petr N. Markova, Valentina D. Kolchanov, Veniamin V. Grigoriev, Dmitry V. Kuzmin, Ivan T. Vitenko, Dmitry D. Wear patterns and dental functioning in an Early Cretaceous stegosaur from Yakutia, Eastern Russia |
author_facet |
Skutschas, Pavel P. Gvozdkova, Vera A. Averianov, Alexander O. Lopatin, Alexey V. Martin, Thomas Schellhorn, Rico Kolosov, Petr N. Markova, Valentina D. Kolchanov, Veniamin V. Grigoriev, Dmitry V. Kuzmin, Ivan T. Vitenko, Dmitry D. |
author_sort |
Skutschas, Pavel P. |
title |
Wear patterns and dental functioning in an Early Cretaceous stegosaur from Yakutia, Eastern Russia |
title_short |
Wear patterns and dental functioning in an Early Cretaceous stegosaur from Yakutia, Eastern Russia |
title_full |
Wear patterns and dental functioning in an Early Cretaceous stegosaur from Yakutia, Eastern Russia |
title_fullStr |
Wear patterns and dental functioning in an Early Cretaceous stegosaur from Yakutia, Eastern Russia |
title_full_unstemmed |
Wear patterns and dental functioning in an Early Cretaceous stegosaur from Yakutia, Eastern Russia |
title_sort |
wear patterns and dental functioning in an early cretaceous stegosaur from yakutia, eastern russia |
publisher |
Public Library of Science (PLoS) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1371/journal.pone.0248163 https://dx.plos.org/10.1371/journal.pone.0248163 |
genre |
Yakutia Siberia |
genre_facet |
Yakutia Siberia |
op_source |
PLOS ONE volume 16, issue 3, page e0248163 ISSN 1932-6203 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1371/journal.pone.0248163 |
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PLOS ONE |
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16 |
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3 |
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e0248163 |
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1810485300936310784 |