Styracosaurus is an extinct genus of herbivorous ceratopsian dinosaur that lived during the Late Cretaceous Period. A Styracosaurus appears in the 1933 King Kong film Son of Kong. Early plans for King Kong included an Arsinoitherium to chase the sailors onto the log where Kong shook them to their deaths, which was later replaced with a Styracosaurus. These sequences may have been filmed, and the Styracosaurus appears in some production photographs, but any footage that may exist remains lost.
When a group of humans was stranded on Skull Island, three of them, including Captain Englehorn, Nils Helstrom, and their Chinese cook Charlie, began to search the jungle for food. However, as they made their way through the brush, they were spotted by a Styracosaurus, which immediately charged at them. The captain shot it once, making it stumble before running away. The dinosaur ran after them and it cornered them into a crevice at the foot of a cliff and tried to ram its head it after them, but to no avail. However, as they tried to shoot it, it got a hold of their rifle and broke it. However, it eventually lost interest, and the three men were able to escape.
After being chased out of the water by a Brontosaurus, the crew of the Venture ran through the jungle straight into where a lone Styracosaurus was grazing. It began to chase them and ate one that fell behind before continuing its chase. It eventually cornered the sailors onto a log bridging a deep chasm with Kong on the other end. The gorilla shook the sailors off the log before throwing it into the pit.
- The original puppet used in scrapped King Kong footage and later Son of Kong resides in Peter Jackson's personal collection of Kong memorabilia.
- The roars created for the Styracosaurus for "The Lost Spider Pit Sequence" were made by slowing down recordings of Fay Wray screaming as Ann Darrow in the original King Kong.
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