Reinaut Formation: Pachystreptoceros

The Reinaut Formation in the south of the continent called Guralta is one of, if not the most extensive fossil site from the late Bobossic. Dated to have been formed between 125 and 122 million Eryobian years ago, the Reinaut Formation offers a glimpse of what life was like in the Kikilian, the latest stage of the Bobossic right before the devastating mass extinction dubbed “The World Scarring” happened.
Back when it was formed, the Reinaut Formation was likely a subtropical or temperate open woodland subject to seasonal rains. The fossils discovered in the Reinaut Formation so far, have mostly been megafaunal animals which tended to fossilise better than smaller animals in the conditions that were present in Reinaut 122 million years ago.

By far the largest animal discovered in Reinaut was Pachystreptoceros giganticus. A huge Ceratanodirid, P. Giganticus is a contender for the title of largest terrestrial animal to have lived before the World Scarring. It had a huge spiralled horn that could measure over 1.5 meters long. Besides being huge, the skull of Pachystreptoceros suggests that, unlike other Streptoceratines, the horn of Pachystreptoceros was adapted for combat instead of being mostly for show. It would’ve been a formidable animal with practically no predators as adults.