Rare fossil discovery reveals new dinosaur species that specialized in eating fruit

During the Cretaceous period, as flowering plants spread and began producing fruit, a specialized type of dinosaur evolved to take advantage of this novel food supply. Paleontologists from Stony Brook University, the Royal Ontario Museum, and the North Dakota Geological Survey have identified a new species named Infernogallus jamesi, shedding light on a previously unknown dietary niche among dinosaurs.

The Discovery

The fossilized remains were recovered from the Hell Creek Formation, a region spanning Montana, North Dakota, South Dakota, and Wyoming. This environment was also home to famous prehistoric species such as Triceratops and Tyrannosaurus rex. The recovered specimen includes a nearly complete, articulated skull and a partial skeleton. Meaning "hell chicken," Infernogallus was a small, feathered, toothless caenagnathid that grew to roughly the size of a turkey and weighed around 12 kilograms (25 pounds), making it one of the smallest fully grown members of its group.

What Scientists Found

Research published in Nature Communications details how high-resolution CT scans were used to examine the animal's skull mechanics. Researchers found that the palatal bones forming the roof of its mouth arched downward, forcing its jaw muscles into a front-to-back alignment. Instead of utilizing a rigid up-and-down biting motion like standard theropods, its jaw slid back and forth. This unique movement matches adaptations found in human jaw structures and fruit-eating birds like the vulturine parrot, enabling Infernogallus to crush stone fruits and separate flesh from main seeds.

Why It Matters

Despite originating from carnivorous ancestors, Infernogallus represents the first known dinosaur specialized for consuming fruit. This breakthrough provides key insights into ancient ecosystems:

• It highlights a parallel evolution between caenagnathids and the spread of large-fruited flowering plants.
• It suggests dinosaurs played a key ecological role in seed dispersal, similar to modern birds, reptiles, and small mammals.
• It points to greater dinosaur diversity and functional roles late in their history, contributing to ongoing debates about pre-extinction ecosystems.

Source: dinosaur fossil discovery - BingNews · Published October 31, 2026 · Photo by Richard Lin on Unsplash