Gorgoraptor

 Although true dinosaurs are sadly absent from Ryl Madol, many similar-looking creatures have convergently evolved in their stead. Among them are the lycaenoraptors, of which Gorgoraptor pilosus is a member. Though bipedal and digitgrade like theropods, the saberteeth and faint hairs along the back show that these are in fact some kind of therapsid, descending from the likes of gorgonopsians, therocephalians or perhaps even cynodonts. 

Using their great sense of smell and decent eyesight, these small-to-medium-sized predators opportunistically stalk the meadows and forests in search of prey. While its smaller relatives live in packs, Gorgoraptor often hunts alone. When it captures prey like lystrodos, it pins them down with its powerful legs and arms and deals the killing blow by severing their windpipe with its characteristic saberteeth. It itself can fall prey to the much larger Carptophoneus, the anteosaurid(?) "tiger" of the island, and of course the titanic Basilosuchus and Decarnodon, anamniote reptiliomorphs, the latter of which could give even large theropods like T. rex a run for their money.

As, unlike true mammals, these synapsids still have full colour-vision like other amniotes, they can often be found with striking patterns and colour schemes. Apart from charismatic stripes, the mane along the neck and back can also shine in bright colours. Perhaps, long ago in the distant past, this is how hair first got its start, not as a means of insulation but as a display feature.