If you ever encounter one of these and you have a flying mount (that has a saddle, of course) like a pteranodon, argentavis, or tapejara, you can provoke it and lead it out to the ocean, fly above the water while it’s still following you and let some megalodons maul it to death for you. You can use this to get rid of any annoying dinosaur that roams near your base. You may have to attack the therizino/dinosaur you’re leading out to sea to keep it interested in killing you.
I got DESTROYED by a mate boosted level 125 while wearing Ascendant & Mastercraft Flak Armor (1500 Total Armor). Avoid these on foot at all costs. If your character doesn't have high movement speed, you probably won't survive. The Ark Freddy Krueger