SAGE MUSEUM
← BACK TO DINOSAURS & DEEP TIME
Early rhinoceros. comparative_taxon_visual
OBJECT DOSSIER · SMITHSONIAN OPEN ACCESS

Early rhinoceros — Trigonias osborni

SAGE Museum Deep Time scientific dossier
Artist / Creator
James St. John
Date / Period
Late Eocene — Chadronian · Late Eocene.
Object Type
composite
Medium
unknown_needs_review
About This Object

Geologic period: Late Eocene — Chadronian

Age: Late Eocene.

Feeding: Herbivorous.

Evidence: The skeleton and skull directly document early rhinoceros anatomy.

Why it matters: Trigonias helps show that the earliest rhinoceroses did not necessarily possess the large horns associated with many modern rhinos.

Plain Language Identity: An early hornless rhinoceros from the Late Eocene.

What You Are Looking At: A composite reconstruction based on Trigonias osborni fossils.

Ecosystem: Late Eocene North American terrestrial ecosystem.

Source Urls: https://naturalhistory.si.edu/visit/virtual-tour/current-exhibits/deep-time-virtual-tour-fossil-list; https://www.si.edu/object/nmnhpaleobiology_3384449

Formation: Chadron Formation, White River Group

Find Location: Colorado, United States for the Smithsonian mounted skeleton.

Enrichment Method: SAGE curated research pass; title + scientific name + source scene matched; chronology and taxonomy conflicts retained rather than silently corrected; evidence separated from inference

Scientific name: Trigonias osborni

Evidence / representation: comparative_taxon_visual

Why It Is In This SAGE Exhibit

comparative_taxon_visual

After the Dinosaurs: Mammals, Ice Ages and the World We Inherited.

Provenance
Smithsonian Deep Time source scene: Costs and Benefits of Living Large
Visual source institution: Wikimedia Commons
Exhibition History
Included in the SAGE Museum Dinosaurs & Deep Time staging exhibit.
Collection & Credit

Media license: CC BY 2.0

https://creativecommons.org/licenses/by/2.0

Subjects & Themes
Trigonias osborni Late Eocene — Chadronian composite Costs and Benefits of Living Large After the Dinosaurs
ORIGINAL COLLECTION SOURCE

This object page stays inside SAGE Museum. The Smithsonian link below is provided only as the original scholarly collection record. It opens separately.

VIEW ORIGINAL SMITHSONIAN RECORD ↗