# Utahraptor (Utahraptor ostrommaysi) — DinoLand

> Field Journal — free dinosaur encyclopedia: 33 species with photos and video, catalog, ancient world maps (Triassic, Jurassic, Cretaceous, Gondwana), quiz, and paleontology glossary.

### id=19: Utahraptor (Utahraptor ostrommaysi)

- URL: https://www.dinoland.ai/species.html?lang=en&id=19
- Diet: Carnivore
- Era: Cretaceous
- Period: 135–130 million years ago
- Length: 5–7 m
- Weight: ≈230–500 кг
- Height: 2 m
- Speed: до 40 km/h
- Habitat: Early Cretaceous floodbasin woods and braided sand sheets
- Region: United States (Utah)
- Discovered: 1991, James I. Kirkland

Fact: “Largest well-known dromaeosaurid—sickle claw rivaling a carpenter’s awl.”

Description: Utahraptor dramatically upscaled the dromaeosaurid bauplan documented by Velociraptor. Heavy musculature, robust limb bones, and caudal vertebrae suited powerful hauling strokes imply subduing of sizable prey including iguanodontians and small sauropods. Trackway evidence from other dromaeosaurids hints at coordinated hunting, although pack behavior in Utahraptor itself remains inferential.

Features:
  - Pedal digit-II unguals approach ~24 cm along their outer curve
  - Feather impressions are phylogenetically expected though rarely preserved
  - Some mass accumulations suggest social aggregation

Related genera: Velociraptor, Deinonychus, Achillobator


## Citation

Field Journal — Dinosaur Encyclopedia — https://www.dinoland.ai

Web: https://www.dinoland.ai/species.html?lang=en&id=19
Index: https://www.dinoland.ai/llms-en.txt