Scientists Discover 212-Million-Year-Old Crocodile Ancestor that Walked Upright and Had No Teeth

Why It Matters

The discovery reshapes our understanding of crocodile‑lineage evolution, showing that bipedalism and beak‑like jaws evolved independently of dinosaurs. It highlights convergent evolution and informs models of locomotor and dietary adaptation in early archosaurs.

Key Takeaways

• *Labrujasuchus expectatus* lived 212 million years ago in New Mexico
• Upright, bipedal stance rare among crocodile ancestors
• Toothless beak mirrors convergent evolution with ornithischian dinosaurs
• Small forelimbs suggest limited grasping ability
• Discovery bridges morphological gap between early archosaurs and later theropods

Pulse Analysis

The newly christened "Witch Croc" adds a striking chapter to the story of archosaur evolution. Unearthed at New Mexico's Ghost Ranch, the 212‑million‑year‑old specimen demonstrates that early crocodile relatives experimented with body plans far removed from the sprawling predators we recognize today. By standing upright on two legs and shedding teeth for a keratinous beak, *Labrujasuchus* occupies a morphological niche previously filled only by certain dinosaurs, confirming a long‑hypothesized transitional form.

Bipedalism in a crocodylian lineage underscores the power of convergent evolution. While dinosaurs and early birds independently adopted upright locomotion to exploit new ecological opportunities, the Witch Croc shows that similar selective pressures can produce comparable solutions across distant branches of the reptile tree. Its tiny forelimbs and beak suggest a diet and foraging strategy distinct from its modern cousins, offering fresh clues about how early archosaurs diversified their feeding habits and locomotor repertoires.

Beyond academic circles, the find captures public imagination, linking paleontological research to popular culture—evidenced by the upcoming Pokémon Fossil Museum exhibit. As scientists continue to refine the archosaur phylogeny, *Labrujasuchus* will serve as a benchmark for future discoveries, prompting reevaluations of how widespread bipedalism and beak development truly were among ancient reptiles. This breakthrough not only fills a fossil gap but also enriches our broader comprehension of evolutionary innovation.