Lately, I have either been far too busy with work to draw, or suffered an artist's block, but here's at least a little sketch of something.
While there isn't a prehistoric animal with the genus name Dinosaurus, there used to be one in the 19th century. Dinosaurus murchisoni, pictured here, was of course not a dinosaur, but a long-fanged dinocephalian. It's a Permian animal actually more closely related to us mammals than, you know, actual dinosaurs.
Dinosaurus has since been sunk into Brithopus so sadly, this hilariously illogical genus no longer exists.
This is a highly speculative reconstruction with plenty of derived mammal-like characteristics, such as full coat of fur and vibrissae. While fur is probably a fair bit older than mammals, and at least some synapsids probably were endothermic back in the Permian, dinocephalians are a fairly primitive offshoot among them. So, take this reconstruction with a fair grain of salt.