What you want to do is tame a male and a female (high levels of course) then have them mass produce. When you have about 10-15 set pump them all into melee and stam and have them wander around the base. And have then on nuetral. So that way the next person to raid you will crash once all of the velonsaurs start shooting
Their ranged attack is bonkers, I went from worrying about every nearby predator, to gunning down everything I don't like.
They burn through Stam fast in turret mode, but they can run forever.
We won't know for certain if their melee damage increases their needle damage until the dev kit releases, or until someone shows conclusive video proof.
Tame one of these and have a blast.