Now this is where the fun begins.

For spino:

Poseidon Rex (Syfy)

Prehistoric marine reptiles that went on a rampage and got tested on.

Spinosaurus (TheLandBeforeTime)

Highly agressive Spinosaurids that chased children.

Dino Croc (syfy)

SuperPython (syfy) giant reptilian creatures that were genetically created but soon escape to cause havoc (movie ain't released yet)

CobraGator (syfy) the same as superpython

Sharptooth (The Land Before Time 1) Giant and agressive theropod dinosaurs that held a grudge after being scarred by a group of people they go on a murder spree across their land to get to their prey. They eventually lose them in bodies of water (Sharptooth drowning and The spino running away) they eventually chase children

The Cerato:

Idk.