Killer bite: Deinorattus

I thought it would be fun and helpful to draw a yawning shot of the speculative genus Deinorattus, as their dentition is quite bizarre.
If you remember from here([link] ), the incisives have adapted to predation, with the upper ones apart and the lower ones fused into a sharp edged fang. When the animal bites the fangs stab the prey and hold it in place, while the lower one closes like a scissor, opening a deep slashing wound .

This drawing ended looking like a thilacine. I have no problem with it, as they are intended to be slightly alike.
The head looks a bit out of proportion with the body, but if you look at the full body shot the animal is built like that ( I can accept I screwed it a little ^^)