Micropachycephalosaurus (meaning "small thick-headed lizard") is an extinct genus of basal marginocephalian dinosaur, containing only the type species, Micropachycephalosaurus hongtuyanensis. It lived in China during the Late Cretaceous (Campanian) and was found in the Jiangjunding Formation. It has the longest name of any dinosaur, with 23 letters in the genus name alone, while the full binomial contains 37 letters.
Micropachycephalosaurus (meaning "small thick-headed lizard") is an extinct genus of basal marginocephalian dinosaur, containing only the type species, Micropachycephalosaurus hongtuyanensis. It lived in China during the Late Cretaceous (Campanian) and was found in the Jiangjunding Formation. It has the longest name of any dinosaur, with 23 letters in the genus name alone, while the full binomial contains 37 letters.
== Discovery and naming == The holotype, IVPP V5542 was found on a cliff southwest of Laiyang, Shandong Province, near Hongtuyan train station. The remains were named and described by Dong Zhiming in 1978, as belonging to the new genus and species Micropachycephalosaurus hongtuyanensis, which he incorrectly figured was discovered in the Wangshi Formation.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).