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Maxillary tooth histology of heterodontosaurid dinosaur Heterodontosaurus tucki Crompton and Charig, 1962 (BP/1/9007), from Lower Jurassic upper Elliot Massospondylus Assemblage Zone of South Africa. A. Histological sections: A1, primary ridge: thick band of translucent dentine lines the labial edge of the tooth, no enamel is present; A2, whole tooth: transversely sectioned at the base of the wear facet; A3, mesial ridge: histologically distinct dentine thickens and enamel is absent; A4, labial edge: on the mesial distal edges the enamel is extremely thin, resulting from wear and likely a natural thinning of the enamel, histologically distinct dentine is present, but thin; A5, lateral edge: the enamel is thickest with no distinct dentine present.

B. Scanning electron micrograph of labial edge of tooth showing crest formation from differential wear from the last stage of polishing.
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Source https://www.app.pan.pl/article/item/app010602023.html
Author Cecilia E. Calvert, Tyler C. Hunt, Niall S. Whalen, Jonah N. Choiniere, Mark A. Norell, and Gregory M. Erickson
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This image was published in Acta Palaeontologica Polonica journal. Their website states that the content of all APP articles is published under the Creative Commons Attribution 4.0 license, unless indicated otherwise.

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current19:05, 30 December 2023Thumbnail for version as of 19:05, 30 December 2023987 × 1,007 (588 KB)FunkMonk{{Information |Description=Maxillary tooth histology of heterodontosaurid dinosaur Heterodontosaurus tucki Crompton and Charig, 1962 (BP/1/9007), from Lower Jurassic upper Elliot Massospondylus Assemblage Zone of South Africa. A. Histological sections: A1, primary ridge: thick band of translucent dentine lines the labial edge of the tooth, no enamel is present; A2, whole tooth: transversely sectioned at the base of the wear facet; A3, mesial ridge: histologically distinct dentine thickens and...

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