Multiplayer tip, this works well! How tame a low level, easy as taming a dodo almost.

Step 1: Have a pteranodon with good stamina.

Step 2: Scout the area for a spino (any level).

Step 3: Carry your tribe-mate to spino (keep your distance in the air)

Step 4: Have your friend tranq it.

Step 5: Use soothing balm/starve tame.

Easy tame, somehow.