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*
A good way to tame these guys is to pick them up with a wyvern (for level selection) and put them in a metal bill board cage outside of the desert.If you don't have a wyvern available, sneak into it's face so it doesn't spike you (or have a buddy do that) and use a riot shield and tranqs.
About a couple weeks ago, I was so lucky I was fooled into thinking a Velonasaur disregarded a shooter when mounting an Allosaur. Just now, I thought about how a Stegosaurus protects it's rider from arrows, and then shot at the Velonasaur between the plates in Hardened mode. I got very little damage comparatively, and knocked it out in relative peace. Stegos are the key, my packmates.
Make a 2x2 cage with ramps and a door. Lure the velonasaur in with a flyer. If you stay close to him he won’t enter turret mode. Leveling melee raises his projectile hit points. Also level stamina to attack longer. A high level can shred everything I’ve come across. Can’t wait for an imprinted one for the speed bonus.
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.