Spinosaurus baryonyx was a contributor on TDF from July 2014 to June 2015. He was one of the very few contributors who tried to discuss dinosaur-related topics, even though he occasionally posted slightly fanboyish content. He left most likely because he was bored due to the lack of contributors, or because he was sick of trolls like the experts are mistaken, then under the alias of Fartosaurus Rex. He was friendly with Prehistory and tyrannospinus, though he scorned tyrannospinus for supporting Fartosaurus Rex.

He was also known as being rather childish, and displayed a discontent with the forum moderators for not dealing with trolls.

He later returned, looking for any of the older contributors and admitting he was eleven when he first started posting, and apologizing for what he called ‘being an absolute douchebag’.