Tooth wear and microwear of theropods from the Late Maastrichtian Marília Formation (Bauru Group), Minas Gerais State, Brazil

Little is known about the tooth wear of South American theropod dinosaurs. This paper describes wear facets in Abelisauridae, Carcharodontosauridae and some indeterminate theropods teeth, from the Marília Formation. Four types of wear facets are proposed: vertically-oriented attritional striations;...

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Bibliographic Details
Published in:Earth and environmental science transactions of the Royal Society of Edinburgh 2017-02, Vol.106 (4), p.229-233
Main Authors: Candeiro, Carlos Roberto A., Currie, Philip J., Candeiro, Caio L., Bergqvist, Lílian P.
Format: Article
Language:English
Subjects:
Marilia
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Summary:Little is known about the tooth wear of South American theropod dinosaurs. This paper describes wear facets in Abelisauridae, Carcharodontosauridae and some indeterminate theropods teeth, from the Marília Formation. Four types of wear facets are proposed: vertically-oriented attritional striations; perpendicular attritional surfaces; oval wear facets; and apical grooves. All these worn surfaces were produced by dental occlusion, except the apical grooves, which are produced by the contact between predator teeth and the prey bone during predator–prey interaction. More detailed biomechanical and hardness testing of teeth and bone may further elucidate the pattern of tooth wear in theropods.
ISSN:1755-6910
1755-6929
DOI:10.1017/S175569101600013X