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Exceptionally simple teeth in sauropod dinosaurs demonstrate a novel approach to herbivory in Late Jurassic ecosystems Project ID: 000345163 Public
23 Media · 21 Specimens · Creator: Melstrom, Keegan · Managed by: Keegan Melstrom

Dinosaurs dominated terrestrial environments for over 100 million years in part due to highly successful feeding strategies. During the Late Jurassic, dinosaur ecosystems exhibit a wide range of dental adaptations. We quantitatively measured dental shape in well-known Late Jurassic dinosaurs to test for a relationship between diet and dental complexity. Sampled taxa exhibit a wide range of dental complexities that are on par with the disparity observed in modern saurians. Ornithischians display complex dentitions, corresponding to their herbivorous habits, whereas theropods exhibit relatively simple teeth related to their carnivorous diet. Diplodocoid sauropods, in contrast to nearly all known herbivores (living or extinct) possess simple teeth. Our analyses reveal that in sauropod dinosaurs tooth complexity is related not to diet but tooth replacement rate. The decoupling of herbivory and tooth complexity, and a strong inverse correlation between complexity and replacement rate, demonstrates a novel approach to herbivory in sauropod dinosaurs.

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Identifier Taxonomy Total Media Date Added Source
dmnh:EVP.27726 Gargoyleosaurus sp. 1 2021-10-13 User Created
dmnh:EVP.27726 Gargoyleosaurus sp. 1 2021-10-13 User Created
byu:2028 Allosaurus sp. 1 2021-10-08 User Created
byu:2028 Allosaurus sp. 1 2021-10-08 User Created
zmb:h:2343 Tornieria sp. 1 2021-10-08 User Created
zmb:h:2347 Tornieria sp. 1 2021-10-08 User Created
zmb:h:2345 Tornieria sp. 1 2021-10-08 User Created
mwc:5822 Nanosaurus sp. 1 2021-10-08 User Created
LACM:DI:128258 Fruitadens sp. 1 2021-10-08 User Created
LACM:DI:128258 Fruitadens sp. 1 2021-10-08 User Created
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