Scientists have identified Labrujasuchus expectatus, a bipedal crocodile relative from the Late Triassic that resembled an ostrich-like dinosaur.
The discovery challenges traditional views of crocodylomorph evolution by showing that ancient relatives of crocodiles developed body plans nearly identical to early dinosaurs. This suggests a period of intense evolutionary experimentation during the dawn of the dinosaur era.
Researchers found the fossil at Ghost Ranch in New Mexico. The creature lived during the Late Triassic, approximately 237–201 million years ago [1]. Unlike modern crocodiles, which are characterized by heavy bodies and sprawling limbs, Labrujasuchus expectatus stood upright on two legs.
One of the most striking features of the specimen is its toothless beak. This anatomical trait is highly unusual for crocodile ancestors, which are typically known for their powerful jaws and teeth. The combination of a bipedal stance and a beak gave the animal a silhouette similar to a flightless bird, or a small theropod dinosaur.
This find highlights how diverse the archosaur lineage was during the Triassic period. While modern crocodiles have remained relatively consistent in their aquatic-adjacent forms, their ancestors once occupied a wide variety of ecological niches, including those that required speed and agility on land.
The specimen provides a rare glimpse into the biological diversity of the New Mexico region millions of years ago. By analyzing the skeletal structure, scientists can better understand how different reptile groups competed for resources before dinosaurs became the dominant land animals.
“Labrujasuchus expectatus stood upright on two legs.”
The existence of Labrujasuchus expectatus demonstrates convergent evolution, where unrelated species evolve similar physical traits to adapt to similar environments. By evolving a bipedal gait and a beak, this crocodile relative occupied a niche typically associated with dinosaurs, proving that the 'dinosaur look' was a successful survival strategy utilized by multiple reptile lineages during the Triassic.
