Here's a way to tame this thing at least how I tamed one (MATERIALS) 1 Rex a couple of tranq darts and taming food first you need to find one tapejaras are mostly found in dangerous areas but 100% guaranteed found in the back part of south zone 1 next you will need A VERY DELIBERATE ACCURATE SHOT STRAIGHT TO THE HEAD in this part you will have to be very sneaky next defend it request a tame first something good at collecting berries for narcs then an equss they're Chemical saddle can make narcotics lastly the Rex you had earlier it can collect raw meat extremely well tons of raw meat means lots of spoiled meat for the narcs and that's how you tame a tapejara or at least how I did it