This creature is fairly easy to tame, as long as it is alone. If in a herd, these dinosaurs will use their powerful stomp attack. It is best to wait for one to leave the group, and try to run it into something, such as a rock or tree, so you can hit it with tranq arrows. Once knocked out, its pretty much a straight forward tame.
In a group they attack, individual they run. Pick the lone wolf and lead it by facing the way you want it to go and trap it against a wall or rock or a safe place. No missed shots, no wasted resources, and a easy Morrelatops tame.
Probably your first tame besides the jerboa. Boomerangs work wonders to knock out. Wait to single out one then knock out in a corner and then use berries. Great for water storage, berry gathering, thatch, and wood!