If you hear your mobile ring and you misplaced it.. run like hell because a spino is staring down at you.. right now..

Hey, ok so the center, coordinates 08.1 / 63.4 spinos will spawn there, if is not high enough just kill it, leave the area and come back after 3 mins. Normally works, I found a 150 and I'm taming it rn

Sam: I heard your mobile ringing
Dad: That's impossible, I lost my phone on the boat.
*Nokia ringtone*
Doctor Grant: *Whispers* Run..

If you try to tame a spino, get it stuck on like the surface because if you knock it out in the shallows in the river mostly megapiranas will attack you and the spino.

How I got mine:
Get a pteranodon
Check for other creatures nearby
Land on a really tall, unclimbable rock
Go ham with any tranquilising weapon
Feed much narcotic
Kill stuff for meat and prime
There you go sir, 1 spino free of charge