What is the longest dinosaur name?

The longest dinosaur name is Micropachycephalosaurus, which means "tiny thick-headed lizard". It was a small, herbivorous dinosaur that lived during the Late Cretaceous period in what is now China. Micropachycephalosaurus had a thick skull with a dome-like structure at the top, similar to other pachycephalosaurs. Its long name reflects the complex scientific naming conventions used to classify and identify different species of dinosaurs.