Micropachycephalosaurus
Micropachycephalosaurus (meaning "small thick-headed lizard") was a monotypic genus of ceratopsian dinosaur. It lived in China during the Late Cretaceous period. The skeleton of the single specimen was found on a cliff southwest of Laiyang, Shandong Province. It was a bipedal and herbivorous dinosaur. Taxonomy. The genus contains only the type species, Micropachycephalosaurus hongtuyanensis. Paleontologist Dong Zhiming originally described it as a member of the Pachycephalosauria, a group of bipedal dome-headed herbivores. However, re-evaluation of the family Pachycephalosauridae by Sullivan in 2006 cast doubt on this assignment. Further study of the original specimens by Butler and  Zhao in 2008 also failed to find any characteristics linking "Micropachycephalosaurus" with the pachycephalosaurs. The one piece of evidence that could provide this link, the supposedly thickened skull roof, was missing from the fossil collection the scientists examined, and so could not be used to support or refute its original classification. Butler and Zhao therefore classified it as an indeterminate member of the Cerapoda. In 2011, cladistic analysis performed by Butler "et al." showed that "Micropachycephalosaurus" is a basal member of the Ceratopsia. "Micropachycephalosaurus" has the longest name of any dinosaur, with 23 letters.