The discovery of fossils of a new shuvosaurid, a distant relative of crocodiles, that lived 212 million years ago in what is now the U.S. state of New Mexico, has been shared by paleontologists. This prehistoric creature, named Labrujasuchus expectatus, had surprising features, such as a beak, lack of teeth, two tiny arms, and the ability to walk on two legs.
Discovery Context
The fossils of L. expectatus were found alongside those of bipedal dinosaurs at the Hayden Quarry at the Ghost Ranch site, famous for its well-preserved fossils. These fossils were dated to the Late Triassic period. The generic name Labrujasuchus comes from “Ranchos de los Brujos,” or Ranch of the Witches, an old Spanish name for the Ghost Ranch area. The Greek word Σοῦχος (suchus) means crocodile.
The species name expectatus references the idea that researchers expected to find a shuvosaurid fossil at the Hayden Quarry. In an email interview with Mongabay, Nathan Smith, study co-author, paleontologist, and director of the Dinosaur Institute, Natural History Museum of Los Angeles County, U.S., explained that the first shuvosaurid described, originally misclassified as a dinosaur, was named Shuvosaurus inexpectatus, as a way to point out that such a bizarre-looking creature was not “expected” in Late Triassic rocks.
Implications of the Discovery
The discovery of L. expectatus has significant implications for understanding the evolution of archosaurs and the ecosystems of the Late Triassic. The ability to walk on two legs, shared by dinosaurs and now by a distant relative of crocodiles, suggests an interesting evolutionary convergence, where different lines of descent developed similar adaptations for the environment.
Furthermore, the presence of L. expectatus alongside bipedal dinosaurs in the same fossil layer raises questions about the interaction between these species and how they coexisted in a shared ecosystem. This opens new lines of investigation into the dynamics of prehistoric communities and how different species adapted and interacted in ancient environments.
Conclusion
The discovery of Labrujasuchus expectatus is a fascinating reminder of the complexity and diversity of life on Earth during the Late Triassic. Continued research in this area promises to reveal more secrets about the evolution of life and how different species developed unique strategies to survive and thrive in varied environments.
Source / Reference: Mongabay