What makes Chindesaurus scientifically significant?

Chindesaurus provides critical insights into the evolutionary radiation of Theropoda. Holotypes and fossil evidence indicate: Incomplete postcranial skeleton including vertebrae, pelvic fragments, and limb bones.

Chindesaurus (Chindesaurus bryansmalli Long & Murry, 1995) - Size, Diet & Triassic Period Facts

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Chindesaurus (Chindesaurus bryansmalli Long & Murry, 1995) - Size, Diet & Triassic Period Facts | DinoOrigin

Evolutionary Taxonomy & Cladistics

View Dinosaur Phylogeny

Phylogenetic classification of Chindesaurus bryansmalli Long & Murry, 1995 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	Chindesaurus	Monophyletic prehistoric clade
Species	Chindesaurus bryansmalli Long & Murry, 1995	Specific authority designation

Anatomy & Physical Characteristics

Chindesaurus was a medium-sized predatory dinosaur discovered near Chinde Point in northern Arizona. Living alongside large rauisuchians and phytosaurs, it was an agile terrestrial predator that inhabited lush Late Triassic riparian forests.

Its precise phylogenetic affinities continue to be researched, with scientists placing it within Herrerasauridae or as a basal theropod.

Diagnostic Morphological Traits

Slender biped with curved neck vertebrae, long tail, and strong grasping digits.

Comparative Scale & Biometrics

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

Approx. 1.3× human length

Chindesaurus (Length)2–2.4 m (6.6–7.9 ft)

Adult Human1.8 m (6.0 ft)

Length

2–2.4 m (6.6–7.9 ft)

Height

0.7–0.9 m (2.3–3.0 ft)

Estimated Mass

20–35 kg (44–77 lbs)

Diet & Feeding Ecology

All Carnivore Species

Trophic Guild: Carnivore

Small vertebrates, early lepidosaurs, and juvenile synapsids.

Paleobiology & Behavior

Early bipedal saurischian predator that inhabited seasonal floodplains during the Late Triassic. Discovered in the Chinle Formation of the American Southwest, Chindesaurus coexisted alongside agile early coelophysoid hunters like Coelophysis.

Habitat & Ecological Biome

Prehistoric Depositional Setting

Lush gymnosperm forests and subtropical river plains with fallen conifer logs.

Fossil Evidence & Specimen Records

Preserved Skeletal Material & Bonebeds

Incomplete postcranial skeleton including vertebrae, pelvic fragments, and limb bones.

Discovery & Taxonomic Naming History

Year of Discovery / Description1984

Type Specimen Locality & FormationPetrified Forest National Park, Arizona, United States

Discovered by fossil preparator Bryan Small during an expedition from the University of California, Berkeley.

Geological Era & Chronostratigraphy

Explore All Triassic Period Fauna

Triassic Period PeriodTemporal Interval: 221–210 Ma (million years ago)

The dawn of the Mesozoic Era. Dinosaurs first emerged in the Late Triassic following the catastrophic Permian-Triassic extinction event, initially occupying modest niches alongside crurotarsan archosaurs.

Where It Lived & Paleoenvironment

North America Dinosaurs

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

Paleogeographic RealmNorth America (North America)

Home to the fossil-rich Morrison Formation of the Late Jurassic and the Hell Creek and Dinosaur Park Formations of the Late Cretaceous.

Fossil Discovery Locality

Scientific Significance & Evolutionary Impact

The anatomical architecture of Chindesaurus 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 Triassic Period fauna.
Paleoecological Guild: Documents trophic specialization (Carnivore) and predator-prey dynamics across its regional ecosystem.
Taphonomic Record: Incomplete postcranial skeleton including vertebrae, pelvic fragments, and limb bones.

Frequently Asked Questions About Chindesaurus

Scientifically verified answers based on peer-reviewed paleontological evidence.

Q1.When did Chindesaurus live?

Chindesaurus lived during the Triassic Period Period, approximately 221–210 Ma (million years ago). This places it within the Mesozoic Era.

Q2.How big was Chindesaurus?

Paleontological estimates place Chindesaurus at a length of 2–2.4 m (6.6–7.9 ft), a hip/standing height of 0.7–0.9 m (2.3–3.0 ft), and a body mass of 20–35 kg (44–77 lbs).

Q3.What was the diet of Chindesaurus?

Classified as a carnivore, Chindesaurus specialized in consuming Small vertebrates, early lepidosaurs, and juvenile synapsids..

Q4.Where were Chindesaurus fossils discovered?

Fossil specimens of Chindesaurus have been recovered from Petrified Forest National Park, Arizona, United States, with notable historic specimens documented in 1984. Discovered by fossil preparator Bryan Small during an expedition from the University of California, Berkeley.

Academic Literature & Peer-Reviewed References

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

New Mexico Museum of Natural History and Science BulletinView Publication
Long, R. A., & Murry, P. A. (1995). Late Triassic (Carnian and Norian) tetrapods from the Southwestern United States. New Mexico Museum of Natural History and Science Bulletin, 4, 1-254.
Curated & Verified: 2026-09-24

Chindesaurus

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