PtycH๏τherates bucculentus: New Mexico’s New Carnivorous Herrerasaurian Unveils Explosive Triᴀssic Dinosaur Diversity

In a discovery that has dramatically expanded our view of early dinosaur evolution, paleontologists have named PtycH๏τherates bucculentus — a fierce, newly identified herrerasaurian carnivore from the Late Triᴀssic of New Mexico.

Described in a May 2026 paper in Nature, the partial skeleton was recovered from the Chinle Formation at Ghost Ranch by a team from the American Museum of Natural History and the University of New Mexico led by Dr. Sterling Nesbitt. The 212-million-year-old specimen includes a well-preserved skull with recurved, serrated teeth, a robust pelvis, and powerful hind limbs, confirming it as a fast, bipedal apex predator roughly 3–4 metres long.

What makes PtycH๏τherates (“folded hunter”) remarkable is its combination of primitive herrerasaurian traits with unexpected specializations: a deep, robust snout suggesting a powerful bite and possible scavenging or bone-crushing capabilities, plus limb proportions indicating greater speed than earlier herrerasaurids. Its presence in the same beds as Coelophysis and other early dinosaurs highlights an unexpectedly rich and diverse carnivore guild in the American Southwest millions of years before the famous Jurᴀssic theropods.

Nesbitt called the find “a game-changer — proof that herrerasaurians were far more diverse and ecologically important than we ever imagined.” The discovery shows that early dinosaur communities were already complex and compeтιтive, with multiple lineages of meat-eaters coexisting and filling different predatory roles.

The holotype is now on display at the New Mexico Museum of Natural History and Science alongside striking life reconstructions. PtycH๏τherates bucculentus proves the Triᴀssic was not a quiet prelude but a dynamic cradle of dinosaur experimentation — and that the American Southwest still holds some of the most surprising chapters in dinosaur history.