New triassic crocodile relative resembled ostrich dinosaur

Scientists have identified a new species of ancient crocodile relative that walked upright on two legs with a toothless beak. The creature, named Labrujasuchus expectatus, lived during the Late Triassic in what is now New Mexico.

The discovery was described in the Journal of Vertebrate Paleontology. Researchers recovered the fossils from the Hayden Quarry at Ghost Ranch. Labrujasuchus expectatus belonged to the shuvosaurid group within the archosaur lineage that led to modern crocodiles yet evolved a body plan similar to bipedal theropod dinosaurs.

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Researchers have described a previously unknown sauropod dinosaur from fossils found in Argentina's Chubut province. The creature, called Bicharracosaurus dionidei, reached about 20 meters in length and lived around 155 million years ago.

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Paleontologists have identified a new raptor-like dinosaur species that lived about 70 million years ago in southern Patagonia. Named Kank australis, the creature likely hunted fish using adaptations similar to those of modern herons.

The tiny arms of Tyrannosaurus rex likely evolved as giant predatory dinosaurs shifted to using their massive skulls and jaws for hunting, according to new research. Scientists examined dozens of theropod species and found a strong connection between shrinking forelimbs and robust skulls. The study suggests this change occurred as predators targeted enormous prey.

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A fossilized Edmontosaurus skull with a Tyrannosaurus tooth still lodged in its face provides rare evidence of a predator-prey encounter from 66 million years ago. Researchers analyzed the specimen at Montana State University's Museum of the Rockies. The study was published in the journal PeerJ.

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