Ptychotherates

Srivastava and Nesbitt 2026

Ptychotherates is an extinct genus of saurischian dinosaur known from the Late Triassic Chinle Formation of Ghost Ranch, New Mexico, United States. The genus contains a single species, Ptychotherates bucculentus, known from a partial skull. The jugal bone of the skull is unusually tall, deeper than in any other Triassic dinosaur. Ptychotherates is closely related to Chindesaurus, Daemonosaurus, and Tawa, together forming the clade Morphoraptora within Herrerasauria.

Temporal range

Triassic

Jurassic

Cretaceous

Paleogene

Neogene

252 201 145 66 0 Ma

PBDB occurrences

Group

Dinosaures

Terrestrial

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Wikimedia

PBDB ↗ Wikipedia ↗

Classification

Dinosauria Unranked clade

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Saurischia Unranked clade

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Morphoraptora Unranked clade

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Ptychotherates Genus

Fossil sites 1 geolocated sites

Distribution

Top countries

🇺🇸 United States

Geological formations

Chinle

Temporal distribution

Rhaetian (205.7–201.4 Ma)

Species (1)

Ptychotherates bucculentus 206 Ma

News 1

New Triassic Carnivorous Dinosaur Identified from Ghost Ranch

United States Late Triassic Triassic fossil specimen +5

Researchers from Virginia Tech (Virginia, USA) have identified a new species of Late Triassic dinosaur. The dinosaur has been named Ptychotherates bucculentus. This new carnivorous dinosaur taxon has been erected based on the detailed examination of an incomplete, well-preserved but jumbled up skull fossil (specimen number CM 31368). The skull comes from the world-famous Coelophysis

11/05/2026 everythingdinosaur

Images 1

Bibliography

Original description

S. Srivastava and S. J. Nesbitt. 2026. A new taxon of saurischian dinosaur from the Coelophysis Quarry of New Mexico, USA (Triassic: latest Norian or Rhaetian) highlights herrerasaurian diversity in the latest Triassic. Papers in Palaeontology 12(2):e70069:1-35 DOI ↗

Bibliography (1)

Ptychotherates

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