New sauropod teeth from the Upper Jurassic of Portugal and their implications for sauropod dental evolution

Papers in Palaeontology, Год журнала: 2025, Номер 11(1)

Опубликована: Янв. 1, 2025

Abstract The Upper Jurassic of Portugal is well known for its dinosaurian fauna, which includes five sauropod species. Although only one these species preserves associated dental material, isolated teeth are commonly found in the units Portugal. morphological diversity Portuguese has already been described and attributed to four morphotypes. Here, we report an additional 24 heart‐shaped teeth, 9 spatulate 16 compressed chisel‐shaped 10 pencil‐shaped hitherto unstudied collection Museu da Lourinhã. All morphotypes clades from fossil record, based on morphology tooth slenderness. statistical tests show a clear relation between widely used Slenderness Index (SI) taxonomy, proves be necessary correctly interpret any usage SI as taxonomic tool. As such, when it comes attribute Turiasauria, Camarasauridae, Titanosauriformes indet., Flagellicaudata. A reassessment evolution shows general trend increasing slenderness all studied groups, disappearance broad‐crowned taxa with developed tooth‐to‐tooth occlusion by end Early Cretaceous. We suggest that this may correlated batteries ornithischians, were more efficient oral food processing.

Язык: Английский

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Sauropodan niche partition during the Early Jurassic of Patagonia, Argentina

Historical Biology, Год журнала: 2025, Номер unknown, С. 1 - 14

Опубликована: Май 20, 2025

Язык: Английский

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