Image: Nigersaurus teeth

Description: Crown form, wear pattern, and microstructure in Nigersaurus taqueti. Wear facets and surface detail is from a worn crown (MNN GAD513), and enamel and dentine microstructure is from left premaxillary teeth in cross-section (MNN GAD514). (A)-Crown in lingual (interior) view showing low-angle wear facet. Magnified views of a cast of the lingual wear facet showing (B)-wear striations in the dentine and (C)-the edge of the facet. (D)-Crown in labial (exterior) view showing high-angle wear facet. Magnified views of a cast of the labial facet showing (E)-coarse scratches on the dentine and (F)-fine scratches on the edge of the facet. (G)-Transverse thin section of two successive premaxillary crowns showing thickened labial enamel and circumferential incremental lines of von Ebner in the dentine. (H)-Magnified view of the older (left) crown showing approximately 60 incremental lines of von Ebner. Scale bar in A and D equals 5 mm; scale bar below F equals 0.5 mm in B, E and F and 1.11 mm in C. Abbreviations: de, dentine; en, enamel; fe, facet edge; g, gouge; s, scratch.
Title: Nigersaurus teeth
Credit: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0001230
Author: Paul C. Sereno, Jeffrey A. Wilson, Lawrence M. Witmer, John A. Whitlock, Abdoulaye Maga, Oumarou Ide, Timothy A. Rowe
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Usage Terms: Creative Commons Attribution 2.5
License: CC BY 2.5
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