These guys are very hard to control because they have high mobility and strong damage. So to make it easier, I will shoot them with tranq arrow until unconscious and then place 3x dinosaur gate to trap (note:place the gate Infront, back and side one gate on each side). Make sure the gates are close to each other. When it gets conscious, just shoot with shotgun and simple pistol you can also use slingshot for a lower damage. For the host, I prefer to use diplodocus because it has a lot of hp and easy to keep it safe. 📌 It will take quite long time for rhyniognatha to get conscious. Hope this helps, enjoy the game.