Limusaurus Pronunciation

Fun Facts

• ✓Limusaurus is one of the only dinosaurs ever discovered that completely lost its teeth as it aged, going from a toothed hatchling to a fully beaked adult, a process scientists confirmed by studying dozens of specimens at different life stages.
• ✓The species name inextricabilis means impossible to free, because the fossils were found in what appears to have been a mud trap that the animals wandered into and could not escape, preserving multiple individuals at once.
• ✓Limusaurus belongs to a group called Elaphrosaurinae, a subfamily of ceratosaurs, meaning it was actually a distant relative of Ceratosaurus, the horned predator, yet it became a plant eater through convergent evolution.
• ✓Its tiny forelimbs and long neck made Limusaurus look strikingly similar to the much later ornithomimid dinosaurs like Gallimimus, even though the two groups were not closely related, a textbook case of convergent evolution separated by tens of millions of years.
• ✓The discovery of Limusaurus in 2009 caused a scientific shake-up in how researchers interpret finger numbering in theropod dinosaurs, sparking a major debate about whether birds inherited finger positions I-II-III or II-III-IV from their ancestors.