Herbivores: Living on Plants

Source Institution: Smithsonian National Museum of Natural History

Source Exhibit: David H. Koch Hall of Fossils - Deep Time

Source Url: https://naturalhistory.si.edu/visit/virtual-tour/current-exhibits/deep-time-virtual-tour-fossil-list

Source Kind: interpretive_topic_or_panel

Use: research inspiration only; SAGE will write original interpretation

Dossier Status: scientifically_enriched_concept_room_08

Plain Language Explanation: Hell Creek herbivores processed plants in very different ways. Triceratops used a beak to crop vegetation and carried closely packed slicing teeth farther back in the jaws. Hadrosaurs such as Edmontosaurus evolved large dental batteries containing many replacement teeth that created broad grinding surfaces. Smaller herbivorous dinosaurs added still more feeding styles. Their teeth reveal diet more directly than they reveal one exact favorite plant.

Evidence: Tooth shape, wear and arrangement provide direct evidence that Triceratops and Edmontosaurus were herbivores.; Hadrosaur dental batteries contained many stacked replacement teeth that maintained a large wear surface.; Ceratopsian tooth batteries were organized differently and produced strong slicing surfaces.; Hell Creek plant fossils provide the vegetation context within which these herbivores fed.

Examples From Collection: Triceratops horridus; Edmontosaurus annectens; Thescelosaurus neglectus; Ceratopsidae indet. tooth

Specific Diet Guard: Tooth anatomy establishes broad feeding mode. It does not by itself prove that a particular herbivore ate Nelumbago or any other single plant species in the collection.

Common Misconception: Calling two dinosaurs herbivores does not mean they ate the same plants or fed at the same height. Different jaws and teeth could partition plant resources.

What Scientists Still Debate: Researchers continue testing browsing height, bite mechanics, chewing motion and dietary selectivity using tooth microwear, jaw biomechanics and rare preserved plant remains.

Sources: https://naturalhistory.si.edu/education/teaching-resources/paleontology/how-do-we-know-what-dinosaurs-and-other-extinct-animals-ate; https://www.si.edu/newsdesk/factsheets/last-american-dinosaurs-discovering-lost-world-exhibition; https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0016574

Enrichment Method: SAGE original interpretive concept; direct Hell Creek fossil evidence separated from feeding inference, paleoart and museum reconstruction