ArticleJournal of anatomy2022
Dental anatomy and replacement patterns in the early Permian stem amniote, Seymouria.
Article in Journal of anatomy, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- The histology of rhynchosaur (Diapsida, Archosauromorpha) ankylothecodonty.Journal of anatomy · 2026Article
- Rethinking thecodonty: the influence of two centuries of comparative dental anatomy on our understanding of tooth evolution.Biology letters · 2025Review
- Cranial osteology and neuroanatomy of the late Permian reptileRoyal Society open science · 2025Article
- Dental anatomy and replacement patterns in the early Permian stem amniote, Seymouria.Journal of anatomy · 2022Article
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2 authors.
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Abstract
The exquisite preservation of maxillary and mandibular fragments of Seymouria has allowed us to examine for the first time in detail the dental anatomy and patterns of development in this stem amniote. The results obtained through histological examination show that Seymouria has pleurodont implantation with ankylosis of the tooth to the labial side of the jawbone. The dentary and maxillary teeth exhibit similar dental characteristics, such as the attachment bone (alveolar bone) and cementum rising above the jawbone on the base of the tooth, and smooth carinae extending lingually toward the tooth apex. Additionally, the clear presence of plicidentine, infolding of dentine into the pulp cavity, was found within the tooth root extending into the tooth crown. Lastly, the tooth replacement pattern is alternating, illustrating that Seymouria retains the classic primitive condition for tetrapods, a pattern that is continued in amniotes. Our results provide an important basis for comparison with other stem amniotes and with amniotes.
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