You don’t need to trap this to tame, it’s a solo tame. If you run up to it, it will go into turret mode then you need to walk circles around it and keep hitting with tranq until it eventually tries to walk away *in turret mode so really slow walking*
I found a bug a few days ago with a pteradacle if that is how you pronuce it. If you use the pteradacle and walk up to a velonasaur on it for some reason the velonasaur goes into turret mode and does not shoot or anything. It just stands there so just walk up to one with a pteradacle and when it stares into your pteradacle for forever just load it with trans off of the pteradacle and you got a velonasaur.
Up for people to see this is the easiest way to tame this guy.