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New theropod remains from the Tiourarén Formation (?Middle Jurassic, Niger) and their bearing on the dental evolution in basal tetanurans

AutorSerrano-Martínez, Alejandro; Ortega, Francisco; Sciscio, Lara; Tent-Manclúse, Ënrique; Fierro Bandera, Ignacio; Knoll, Fabien
Palabras claveTheropoda
Dental morphology
Fecha de publicaciónfeb-2015
CitaciónProceedings of the Geologists' Association 126(1): 107-118 (2015)
ResumenA fragment of a maxilla and isolated theropod teeth from the (?) Middle Jurassic Tiourarén Formation are described. The specimens come from Tadibene, in the rural community of Aderbissinat, Thirozerine Department, Agadez Region, Niger. They were identified through direct comparison with teeth previously described in the literature as well as on the basis of discriminant and morphometric analyses. Our results suggest they belong to Ceratosauridae, Megalosauridae, and the oldest representatives of Spinosauridae. The analyzed sample shows some uncommon characters, such as spinosaurid-like ornamentation in megalosaurid-like teeth, or spinosaurid-like teeth with a low number of denticles, which sheds light on tooth morphology and dental evolution in basal tetanurans and early spinosaurids.
DescripciónReceived 15 November 2013, Revised 16 October 2014, Accepted 21 October 2014, Available online 4 December 2014
Versión del editorhttp://dx.doi.org/10.1016/j.pgeola.2014.10.005
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