ORGANIC
typical dino with guns, not durable enough, vulnerable to poison damage etc.
AUGMENTED
Organic dino with enhancements, your dino cyborgs, tough and high damage, durable but still vulnerable to poison damage.
MECHANICAL
Dinos without organic parts, very durable, no HP bar but shield bar instead. Not highly affected by poison damage but very vulnerable with electric-type weapons and abilities.
SYMBIOTE
Alien dinos, very exotic, every attacks are bounded by poison, decent units with out-of-this-world abilities.