Guanlong (Guanlong wucaii Xu et al., 2006) - Size, Diet & Jurassic Period Facts

Q: What makes Guanlong scientifically significant?

Guanlong provides critical insights into the evolutionary radiation of Theropoda. Holotypes and fossil evidence indicate: Two articulated specimens found stacked vertically in a dinosaur death trap.

DinoOrigin.comEncyclopedia of Prehistoric LifePrehistoric Encyclopedia

Guanlong (Guanlong wucaii Xu et al., 2006) - Size, Diet & Jurassic Period Facts | DinoOrigin

Evolutionary Taxonomy & Cladistics

View Dinosaur Phylogeny

Phylogenetic classification of Guanlong wucaii Xu et al., 2006 based on peer-reviewed cladistic analyses of diagnostic skeletal synapomorphies.

Taxonomic Rank	Taxon / Clade	Diagnostic Context
Kingdom	Animalia	Monophyletic prehistoric clade
Phylum	Chordata	Monophyletic prehistoric clade
Clade	Dinosauria	Monophyletic prehistoric clade
Order	Saurischia (Lizard-Hipped Dinosaurs)	Characterized ancestrally by a triradiate pelvis with an anteriorly pointing pubis.
Suborder	Theropoda	Bipedal saurischian dinosaurs, historically dominated by carnivores and including the avian lineage.
Genus	Guanlong	Monophyletic prehistoric clade
Species	Guanlong wucaii Xu et al., 2006	Specific authority designation

Anatomy & Physical Characteristics

Guanlong ('crown dragon') represents one of the earliest and most primitive known tyrannosauroids. Living 160 million years ago, it stood roughly 3 meters long and possessed long, three-fingered grasping arms and a delicate, paper-thin cranial crest supported by trabecular bone.

Its discovery established that tyrannosauroids originated as modest, agile pursuit predators long before evolving into the multi-ton macropredators of the Late Cretaceous.

Diagnostic Morphological Traits

Slender biped with filamentous protofeathers, long three-fingered arms, and a tall, perforated crest along the snout.

Comparative Scale & Biometrics

Anatomical dimensions relative to an average adult human (1.8 m / 6 ft tall)

Approx. 1.8× human length

Guanlong (Length)2.8–3.2 m (9.2–10.5 ft)

Adult Human1.8 m (6.0 ft)

Length

2.8–3.2 m (9.2–10.5 ft)

Height

1–1.2 m (3.3–3.9 ft)

Estimated Mass

65–100 kg (143–220 lbs)

Diet & Feeding Ecology

All Carnivore Species

Trophic Guild: Carnivore

Small dinosaurs, mammals, lizards, and insects caught with sharp recurved teeth.

Paleobiology & Behavior

Early proceratosaurid tyrannosauroid featuring an elaborate, fragile cranial crest used for visual species recognition. In the Shishugou Formation of northwestern China, Guanlong coexisted in the forested floodplain with larger predatory theropods like Sinraptor and Monolophosaurus.

Habitat & Ecological Biome

Prehistoric Depositional Setting

Forested volcanic mudflat basins and marshland borders.

Fossil Evidence & Specimen Records

Preserved Skeletal Material & Bonebeds

Two articulated specimens found stacked vertically in a dinosaur death trap.

Discovery & Taxonomic Naming History

Year of Discovery / Description2002

Type Specimen Locality & FormationShishugou Formation, Xinjiang, China

Excavated from ancient mud pit death traps by Xu Xing and James Clark.

Geological Era & Chronostratigraphy

Explore All Jurassic Period Fauna

Jurassic Period PeriodTemporal Interval: 161–159 Ma (million years ago)

Marked by lush greenhouse climates, the breakup of Pangaea, and the evolutionary explosion of sauropods, plated stegosaurs, and apex megalosauroid and allosauroid theropods.

Where It Lived & Paleoenvironment

Asia Dinosaurs

During the Mesozoic Era, continental drift progressively reconfigured land bridges, atmospheric currents, and regional precipitation regimes. Fossils of Guanlong evidence its adaptation to the paleoenvironments of Asia.

Paleogeographic RealmAsia (Asia)

Renowned for the exceptionally preserved feathered dinosaurs of Liaoning, China and the Cretaceous dune habitats of the Gobi Desert in Mongolia.

Fossil Discovery Locality

Scientific Significance & Evolutionary Impact

The anatomical architecture of Guanlong serves as a crucial benchmark in vertebrate paleontology, illustrating key adaptive radiations within Theropoda.

Phylogenetic Placement: Informs cladistic debates concerning the divergence, skull biomechanics, and skeletal evolution of Jurassic Period fauna.
Paleoecological Guild: Documents trophic specialization (Carnivore) and predator-prey dynamics across its regional ecosystem.
Taphonomic Record: Two articulated specimens found stacked vertically in a dinosaur death trap.

Frequently Asked Questions About Guanlong

Scientifically verified answers based on peer-reviewed paleontological evidence.

Q1.When did Guanlong live?

Guanlong lived during the Jurassic Period Period, approximately 161–159 Ma (million years ago). This places it within the Mesozoic Era.

Q2.How big was Guanlong?

Paleontological estimates place Guanlong at a length of 2.8–3.2 m (9.2–10.5 ft), a hip/standing height of 1–1.2 m (3.3–3.9 ft), and a body mass of 65–100 kg (143–220 lbs).

Q3.What was the diet of Guanlong?

Classified as a carnivore, Guanlong specialized in consuming Small dinosaurs, mammals, lizards, and insects caught with sharp recurved teeth..

Q4.Where were Guanlong fossils discovered?

Fossil specimens of Guanlong have been recovered from Shishugou Formation, Xinjiang, China, with notable historic specimens documented in 2002. Excavated from ancient mud pit death traps by Xu Xing and James Clark.

What makes Guanlong scientifically significant?

Academic Literature & Peer-Reviewed References

Authoritative citations establishing the factual taxonomy, biometrics, and anatomy of Guanlong.

NatureView Publication
Xu, X., Clark, J. M., Forster, C. A., Norell, M. A., Erickson, G. M., Eberth, D. A., Jia, C., & Zhao, Q. (2006). A basal tyrannosauroid dinosaur from the Late Jurassic of China. Nature, 439(7077), 715-718. https://doi.org/10.1038/nature04511
Curated & Verified: 2026-09-24

Guanlong

Quick Facts