Were Crocodiles Ever Vegetarians? Study of 146 Fossil Teeth Reveals Surprising Shift in Ancestors' Diet After the Triassic Extinction

Were Crocodiles Ever Vegetarians? Study of 146 Fossil Teeth Reveals Surprising Shift in Ancestors’ Diet After the Triassic Extinction

Written by Caio Aviz

Published on 03/03/2026 at 15:14

Representação ilustrativa de um crocodiliforme ancestral consumindo vegetação, em referência ao estudo que analisou 146 dentes fósseis e indicou diversidade alimentar após a extinção do Triássico.

Be the first to react!

Scientific Research Analyzes 146 Fossil Teeth and Points Out That Ancestors of Crocodiles May Have Developed Herbivorous Diets Throughout Evolution

A paleontological investigation released by the University of Utah and the Museum of Natural History of the United States has provided new evidence concerning the diet of ancient crocodyliforms, expanding the understanding of the evolution of these reptiles. The analysis examined 146 fossil teeth from 16 extinct species, and based on comparative criteria, indicated that some of these animals may have exhibited dietary habits distinct from modern crocodiles. The study, conducted by paleontologist Keegan Melstrom, revealed that the dietary diversity in the past was broader than previously thought.

Technical Analysis of the Teeth Reveals Distinct Patterns

The research identified clear differences in the dental morphology of the fossils examined, thus allowing inferences about possible diets. As explained by Keegan Melstrom, carnivores tend to have simple, conical teeth, while herbivores develop more complex structures adapted for plant chewing. Some of the analyzed fossils had a shape similar to that of current crocodiles, suggesting a meat-based diet. However, other specimens had straighter teeth with distinct characteristics, indicating possible adaptations to varied diets.

Comparative Method Reinforces Dietary Reconstruction

To deepen the analysis, the researchers applied a comparative method that confronts fossils with teeth from current species whose dietary habits are already known. This approach allowed them to reconstruct dietary patterns with greater accuracy, as it relates ancient structures to contemporary biological data. This way, the team was able to identify signs of dietary diversity throughout the evolutionary history of crocodyliforms. The procedure follows recognized scientific criteria and contributes to greater consistency in interpreting fossil data.

ARTICLE CONTINUES BELOW

Evolution After the Triassic Extinction

The researchers believe that herbivorous crocodyliforms may have emerged early in the evolutionary trajectory of the group, shortly after the mass extinction at the end of the Triassic period, which occurred about 201 million years ago. This event marked profound environmental transformations and opened the way for new adaptations among different species. There is still no definitive conclusion on the subject; however, dietary changes over geological time are phenomena observed in various animal groups. Thus, the hypothesis of dietary transition within crocodyliforms is considered compatible with the known evolutionary context.

Scientific Impact of the Discovery

The possibility of ancestral crocodiles with a herbivorous diet expands the understanding of the ecological flexibility of these reptiles over millions of years. Furthermore, the study demonstrates that evolution does not follow a fixed pattern, but may involve significant transformations in dietary behavior. Although further research is needed to consolidate the conclusions, the published analysis contributes to deepen the scientific debate about the diversity of crocodyliforms.

In light of this evidence, could the dietary evolution of crocodiles have been much more dynamic than that observed in current species?

Were Crocodiles Ever Vegetarians? Study of 146 Fossil Teeth Reveals Surprising Shift in Ancestors’ Diet After the Triassic Extinction

Scientific Research Analyzes 146 Fossil Teeth and Points Out That Ancestors of Crocodiles May Have Developed Herbivorous Diets Throughout Evolution

Technical Analysis of the Teeth Reveals Distinct Patterns

Comparative Method Reinforces Dietary Reconstruction

Evolution After the Triassic Extinction

Scientific Impact of the Discovery

Forget petroleum-based asphalt: a Scottish company transforms 684,000 plastic bottles into one kilometer of road that is 60% more resistant and up to 10 times more durable, and the technology has already started replacing traditional asphalt in more than 30 countries.

With billions in loans, China is rebuilding Nigeria’s railway network from scratch, abandoning the British colonial tracks that have turned to scrap and creating a corridor of over 1,300 km to take the load off the roads of Africa’s largest economy.

Austrian engineers have developed an inflatable concrete technology that transforms flat slabs into domes using only air pressure, eliminating scaffolding and temporary forms, and potentially changing the way bridges, tunnels, and curved roofs are constructed worldwide.

Australia prepares to dredge 96.5 million m³ in Moreton Bay to deepen, widen, and realign channels of the Port of Brisbane, in a project of up to 25 years designed to accommodate larger ships and enhance maritime safety and regional port efficiency.

Study solves great ancient mystery: remains of Philip II, father of Alexander the Great, are identified in Vergina and resolves the enigma of the Macedonian royal tombs that had lasted half a century.

Larger than the Toyota Hilux and with a towing capacity of 3.5 tons, the new MG U9 2026 features a 2.5 turbodiesel engine, 520 Nm, 4×4 traction with three locks, and an almost full-size build.

For the first time in history, a submarine cable will descend to four thousand meters deep under the ice of the North Pole to ensure that the internet between Europe and Asia no longer depends on conflict zones in the Middle East.

While the world discusses geopolitics, China is quietly closing a deal with its Kazakh neighbor to secure grain supplies during any global food crisis, with more than 3,600 Kazakh companies already able to export directly to the Chinese market.

A British company has installed in the middle of the ocean the world’s first floating platform that generates electricity 24 hours a day from the temperature difference between the surface and the depths of the Atlantic, without relying on wind or sun.

Amid the United States’ economic blockade, China delivers 15,000 tons of rice to Cuba as part of a 60,000-ton donation personally approved by Xi Jinping. The package includes 80 million dollars and solar panels for hospitals.

The James Webb telescope spotted a planet 700 light-years from Earth with mornings full of sand clouds and nights with clear skies, the temperature difference between the two hemispheres reaches an impressive 170 degrees.

Were Crocodiles Ever Vegetarians? Study of 146 Fossil Teeth Reveals Surprising Shift in Ancestors’ Diet After the Triassic Extinction

Scientific Research Analyzes 146 Fossil Teeth and Points Out That Ancestors of Crocodiles May Have Developed Herbivorous Diets Throughout Evolution

Technical Analysis of the Teeth Reveals Distinct Patterns

Comparative Method Reinforces Dietary Reconstruction

Evolution After the Triassic Extinction

Scientific Impact of the Discovery

Forget petroleum-based asphalt: a Scottish company transforms 684,000 plastic bottles into one kilometer of road that is 60% more resistant and up to 10 times more durable, and the technology has already started replacing traditional asphalt in more than 30 countries.

With billions in loans, China is rebuilding Nigeria’s railway network from scratch, abandoning the British colonial tracks that have turned to scrap and creating a corridor of over 1,300 km to take the load off the roads of Africa’s largest economy.

Austrian engineers have developed an inflatable concrete technology that transforms flat slabs into domes using only air pressure, eliminating scaffolding and temporary forms, and potentially changing the way bridges, tunnels, and curved roofs are constructed worldwide.

Australia prepares to dredge 96.5 million m³ in Moreton Bay to deepen, widen, and realign channels of the Port of Brisbane, in a project of up to 25 years designed to accommodate larger ships and enhance maritime safety and regional port efficiency.

Study solves great ancient mystery: remains of Philip II, father of Alexander the Great, are identified in Vergina and resolves the enigma of the Macedonian royal tombs that had lasted half a century.

Larger than the Toyota Hilux and with a towing capacity of 3.5 tons, the new MG U9 2026 features a 2.5 turbodiesel engine, 520 Nm, 4×4 traction with three locks, and an almost full-size build.

For the first time in history, a submarine cable will descend to four thousand meters deep under the ice of the North Pole to ensure that the internet between Europe and Asia no longer depends on conflict zones in the Middle East.

A British company has installed in the middle of the ocean the world’s first floating platform that generates electricity 24 hours a day from the temperature difference between the surface and the depths of the Atlantic, without relying on wind or sun.

The James Webb telescope spotted a planet 700 light-years from Earth with mornings full of sand clouds and nights with clear skies, the temperature difference between the two hemispheres reaches an impressive 170 degrees.

A former Hong Kong police officer has just become the first astronaut from her city to go to space. She embarked on the Shenzhou-23 mission alongside two other colleagues who will face muscle atrophy, radiation, and prolonged fatigue in orbit.

For the first time in history, a submarine cable will descend to four thousand meters deep under the ice of the North Pole to ensure that the internet between Europe and Asia no longer depends on conflict zones in the Middle East.

While the world discusses geopolitics, China is quietly closing a deal with its Kazakh neighbor to secure grain supplies during any global food crisis, with more than 3,600 Kazakh companies already able to export directly to the Chinese market.

A British company has installed in the middle of the ocean the world’s first floating platform that generates electricity 24 hours a day from the temperature difference between the surface and the depths of the Atlantic, without relying on wind or sun.

Amid the United States’ economic blockade, China delivers 15,000 tons of rice to Cuba as part of a 60,000-ton donation personally approved by Xi Jinping. The package includes 80 million dollars and solar panels for hospitals.

The James Webb telescope spotted a planet 700 light-years from Earth with mornings full of sand clouds and nights with clear skies, the temperature difference between the two hemispheres reaches an impressive 170 degrees.