Tooth ultrastructure of Late Triassic Haramiyidae

Titre Tooth ultrastructure of Late Triassic Haramiyidae
Titre court Tooth ultrastructure of Late Triassic Haramiyidae
Type de document article
Auteur(s) Frank, R. M.
Sigoneau-Russell, D.
Voegel, J. C.
Date 1984
Titre de la publication Journal of Dental Research
Volume 63
5
N° de page(s) 661-664
Résumé Six molars of Haramiyidae from the French lower Rhaetic were examined by scanning and transmission electron microscopy, and by electron diffraction. Typical polished wear facets were located on the tops and on the occlusal bases of cuspids. Enamel was found to have had a structural pattern defined as "pre-prismatic", consisting of a repetitive pinnate orientation of the c-axes of apatite crystallites but without interprismatic material. Peritubular dentin was not found, but hydroxyapatite deposition in the dentinal tubular lumens was observed, whereas typical denticles with dentinal tubules and hydroxyapatite deposits were located in the pulp chambers. Taken together, these different features are strongly indicative of mastication, and hence enforce the suspected mammalian status of the Haramiyidae.
DOI doi.org/10.1177/00220345840630051101
Collection Notre bibliothèque
Frank, R. M., Sigoneau-Russell, D. and Voegel, J. C., 1984. Tooth ultrastructure of Late Triassic Haramiyidae. Journal of Dental Research. 63 n° 5. p. 661-664.

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