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The collection/Utahceratops

EXHIBIT 192

Utahceratops

Utahceratops gettyi

Utahceratops combined an elongated frill with short, blunt brow horns that projected strongly sideways. [7]

Evidence profile

TWO WAYS TO PICTURE THE PAST

Compare the evidence with the familiar movie image. The illustrations are not to a shared scale.

01 / FOSSIL VIEW

The evidence in the bones

Utahceratops cranial elements and a cast of a restored skull.

Published cranial-element composite and restored skull cast, assembled from multiple Utahceratops specimens; orbital photography is reversed in the original figure. This is not one complete skull. Living colors and soft tissues remain uncertain. [1]

Utahceratops.png · Scott D. Sampson, Mark A. Loewen, Andrew A. Farke, Eric M. Roberts, Catherine A. Forster, Joshua A. Smith and Alan L. Titus. CC BY 2.5. Proportional resizing and WebP conversion; no anatomy edits. Current Commons composition preserved.

The photograph or figure shows the credited fossil material; displayed mounts and labels can include interpretation.

02 / MOVIE-STYLE INTERPRETATION

A cinematic imagination

Illustrative reconstruction of Utahceratops; colors, soft tissues and missing anatomy remain interpretive.

Original cinematic interpretation of Utahceratops. The distinctive short blunt brow horns, posterior nasal horn and notched frill follow the skull evidence. External horn sheaths, skin and living proportions remain reconstructed choices. Lighting, colors and scenery are artistic choices; this image does not document directly observed behavior. Lighting, coloration and scenery are artistic choices. This image does not document a fossil locality or behavior.

Original artwork · artistic interpretation.

Scientific view: source-informed reconstruction, credited paleoart or specimen-based imagery. Movie-style view: Original artistic interpretation. Reconstructions involve uncertainty.

PERIODLate Cretaceous[1]
DIETHerbivoreEvidence and uncertainty in the dossier
TOTAL LENGTHSee the dossierEstimate scope matters
FOSSILS FOUNDUtah, USA[1]
CompareRead the dossierView the sources

MEET THE ANIMAL

Meet Utahceratops

Utahceratops was a large horned dinosaur from Utah's Late Cretaceous rocks. It carried a substantial frill, a nose horn and brow horns directed outward. Its appearance differed from the more elaborately ornamented Kosmoceratops found in the same formation. Discovering these animals helped reveal how varied the horned dinosaurs of western North America could be, even within one region. [D2]

A beak and closely packed tooth columns provided equipment for cutting plant food. The museum's six-to-seven-metre length reference is an educational estimate without a specified measured individual or growth stage. The bony frill also contained openings, but they were covered with skin in life. A fossil's open spaces therefore should not automatically be drawn as holes right through a living animal's head covering. [D7]

A bone accumulation has prompted questions about its social life. Meeting research describes transported and weathered remains rather than a complete group preserved exactly as it stood. Water can bring bones together after death. That evidence makes a stable herd harder to establish and prevents a busy fossil quarry from becoming a detailed story about living family groups without further support. [D3]

PREHISTORIC ANIMAL DOSSIER

A life in profile.

The animal, the evidence, and the questions still open.

A beak and closely packed tooth columns processed plants. Mixed-age bonebed remains require taphonomic interpretation before social conclusions. [D7] [D3]

Profile scope: U. gettyi; Utah Kaiparowits specimens, including holotype cranium UMNH VP 16784 and referred partial skeletons. [D1]

Time
Late Cretaceous
Fossil locations in this exhibit
Utah, USA
How to read the evidence

Source supported identifies a description documented by the cited source. Inferred marks a reconstruction or functional estimate. Debated marks competing interpretations. Not established means the sources reviewed for this dossier do not support a firm conclusion; it does not mean a behavior never occurred.

A size reference is an estimate, not a population range. Nesting evidence does not by itself establish courtship, mate choice, or lifelong pairing.

Length

Inferred

About 6–7 m; museum reference

NHMU’s educational reconstruction interval is not a measured individual or species-size range; specimen, method and maturity are unspecified. [D7]

Body mass

Inferred

About 3–4 t; institutional reference

The discovery announcement’s estimate lacks a named individual, maturity assessment and mass method; it is not a species range. [D2]

Diet

Inferred

Plant eater

A beak and dental battery of closely packed tooth columns formed cutting surfaces; the exact plants eaten remain unknown. [D7]

Time and habitat

Source supported

Late Campanian; southern Utah

Kaiparowits Formation coastal-plain rivers and floodplains; northern hemisphere landmass Laramidia. [D1]

Locomotion

Inferred

Four-legged body plan

Ceratopsid posture inferred comparatively; genus-specific trackways, gait and speed are not established here. [D6]

Distinctive anatomy

Source supported

Elongated frill; blunt sideways brow horns

The nasal horn lies unusually far back, behind the nostril. Brow cores are short and dorsolaterally directed. [D1]

Reproduction & life together

Reproduction and life cycle

Not established

Not established here

Sampled limb bones show remodeling that can erase growth marks; this does not establish breeding age, clutch size, nests or parental care. [D4]

Mating and courtship

Not established

Not established here

Ceratopsian sexual-selection hypotheses are comparative. Ornament shape does not establish this genus’s mate choice, courtship sequence or sex-specific roles. [D5]

Social behavior

Inferred

Mixed-age fossil association; behavior unresolved

Locality 942 contains disarticulated juvenile, subadult and adult remains in a river channel. Weathering and transport complicate any inference of a living herd. [D3]

Dossier research & sources

Sources and inspection notes for the claims in this profile.

  1. New Horned Dinosaurs from Utah Provide Evidence for Intracontinental Dinosaur EndemismPLOS ONE; Sampson and colleagues (2010) · Accessed 2026-10-02Original full text and figures inspected: distinct Utah genera, Kaiparowits setting and cranial diagnoses. The printed Kosmoceratops referral repeats Utahceratops number UMNH VP 12198; that apparent error is not propagated. · Inspected: page
  2. Amazing Horned Dinosaurs Unearthed on “Lost Continent”Natural History Museum of Utah (2010) · Accessed 2026-10-02Institutional announcement inspected: educational size/mass references and plant-eating body plan; specimen, maturity and mass method unspecified. Display hypotheses remain hypotheses. · Inspected: page
  3. Society of Vertebrate Paleontology 71st Annual Meeting: Program and AbstractsSociety of Vertebrate Paleontology; Levitt; Brandau and Irmis (2011) · Accessed 2026-10-02Original meeting abstracts inspected, not full later studies. Levitt describes growth tissues in Kosmoceratops and Utahceratops; Brandau/Irmis describe transported, weathered Utahceratops material at locality 942. · Inspected: abstract
  4. Filling in Gaps in the Ceratopsid Histologic Database: Histology of Two Basal Centrosaurines and an Assessment of the Utility of Rib Histology in the CeratopsidaeThe Anatomical Record; Hedrick and colleagues (online 2019; issue 2020) · Accessed 2026-10-02Original full publisher text inspected: ANS 15800 juvenile/young subadult, growth and rib remodeling. Kosmoceratops/Utahceratops comparisons summarize Levitt 2013; that thesis was not independently accessed. · Inspected: page
  5. Patterns of divergence in the morphology of ceratopsian dinosaurs: sympatry is not a driver of ornament evolutionProceedings of the Royal Society B; Knapp, Knell, Farke, Loewen and Hone (2018) · Accessed 2026-10-02Original full text inspected. Comparative ornament-divergence analysis; sexual-selection hypothesis is not a directly observed mating behavior or identified sex. · Inspected: page
  6. Osteological correlates for quadrupedality in ornithischian dinosaursActa Palaeontologica Polonica; Maidment and Barrett (2014) · Accessed 2026-10-02Original full paper inspected. Ceratopsidae treated as quadrupedal within herbivorous Ornithischia; application to skull-only taxa is explicitly comparative. · Inspected: page
  7. Utahceratops gettyiNatural History Museum of Utah; Deanna Brandau (2012) · Accessed 2026-10-02Institutional profile inspected: 6–7 m educational reference, 2.3 m skull, beak/dental battery and skin-covered frill fenestrae. Total-body estimate lacks specimen/method/maturity details. · Inspected: page

THE STORY IN THE FOSSILS

Reading a river-channel bonebed

The preliminary taphonomic study found weathered bones that were disarticulated before transport and burial. Their association preserves a depositional history, not a direct snapshot of herd behavior. [3]

The large frill contained bony openings covered by skin in life. A restored skull can show these windows without implying visible holes through the living animal’s neck shield. [7]

A note on scale and time

The dossier identifies the scope of each reference estimate. A mount, an individual fossil and a species-wide adult range are different measurements. Comparison metrics remain unavailable where adult scope has not been established. Unknown does not mean zero.

Sources & editorial notes

Sources support the stated claims and scopes. Refer to the evidence notes for uncertainty.

  1. New Horned Dinosaurs from Utah Provide Evidence for Intracontinental Dinosaur EndemismPLOS ONE; Sampson and colleagues (2010) · Accessed 2026-10-02Original full text and figures inspected: distinct Utah genera, Kaiparowits setting and cranial diagnoses. The printed Kosmoceratops referral repeats Utahceratops number UMNH VP 12198; that apparent error is not propagated. · Inspected: page
  2. Amazing Horned Dinosaurs Unearthed on “Lost Continent”Natural History Museum of Utah (2010) · Accessed 2026-10-02Institutional announcement inspected: educational size/mass references and plant-eating body plan; specimen, maturity and mass method unspecified. Display hypotheses remain hypotheses. · Inspected: page
  3. Society of Vertebrate Paleontology 71st Annual Meeting: Program and AbstractsSociety of Vertebrate Paleontology; Levitt; Brandau and Irmis (2011) · Accessed 2026-10-02Original meeting abstracts inspected, not full later studies. Levitt describes growth tissues in Kosmoceratops and Utahceratops; Brandau/Irmis describe transported, weathered Utahceratops material at locality 942. · Inspected: abstract
  4. Filling in Gaps in the Ceratopsid Histologic Database: Histology of Two Basal Centrosaurines and an Assessment of the Utility of Rib Histology in the CeratopsidaeThe Anatomical Record; Hedrick and colleagues (online 2019; issue 2020) · Accessed 2026-10-02Original full publisher text inspected: ANS 15800 juvenile/young subadult, growth and rib remodeling. Kosmoceratops/Utahceratops comparisons summarize Levitt 2013; that thesis was not independently accessed. · Inspected: page
  5. Patterns of divergence in the morphology of ceratopsian dinosaurs: sympatry is not a driver of ornament evolutionProceedings of the Royal Society B; Knapp, Knell, Farke, Loewen and Hone (2018) · Accessed 2026-10-02Original full text inspected. Comparative ornament-divergence analysis; sexual-selection hypothesis is not a directly observed mating behavior or identified sex. · Inspected: page
  6. Osteological correlates for quadrupedality in ornithischian dinosaursActa Palaeontologica Polonica; Maidment and Barrett (2014) · Accessed 2026-10-02Original full paper inspected. Ceratopsidae treated as quadrupedal within herbivorous Ornithischia; application to skull-only taxa is explicitly comparative. · Inspected: page
  7. Utahceratops gettyiNatural History Museum of Utah; Deanna Brandau (2012) · Accessed 2026-10-02Institutional profile inspected: 6–7 m educational reference, 2.3 m skull, beak/dental battery and skin-covered frill fenestrae. Total-body estimate lacks specimen/method/maturity details. · Inspected: page

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