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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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  ID Part Object Taxonomy Type Date Added Publication Status  
000390947 Dentary teeth dmnh:EVP.27726 Gargoyleosaurus sp. Mesh 2021-10-13 Restricted Download  
000390942 Maxillary teeth dmnh:EVP.27726 Gargoyleosaurus sp. Mesh 2021-10-13 Restricted Download  
000390262 Premaxillary teeth byu:2028 Allosaurus sp. Mesh 2021-10-08 Open Download  
000390257 Dentary teeth byu:2028 Allosaurus sp. Mesh 2021-10-08 Open Download  
000390252 Premaxillary teeth zmb:h:2343 Tornieria sp. Mesh 2021-10-08 Open Download  
000390247 Dentary teeth zmb:h:2347 Tornieria sp. Mesh 2021-10-08 Open Download  
000390237 Maxillary teeth zmb:h:2345 Tornieria sp. Mesh 2021-10-08 Open Download  
000390229 mwc:5822 Nanosaurus sp. Mesh 2021-10-08 Open Download  
000390223 Dentary teeth LACM:DI:128258 Fruitadens sp. Mesh 2021-10-08 Open Download  
000390218 Maxillary teeth LACM:DI:128258 Fruitadens sp. Mesh 2021-10-08 Open Download  
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