Castles & Crusades doesn't have a lot of dinosaurs so here are the ones that inhabit Yavana converted from AD&D. I tried to have it so that certain types (club tail, long neck, duckbill) only had one representative so that I didn't have to describe minute differences between extinct animals.
Allosaurus #1d2 AC 14 HD 15 Move 120’ Attacks 3 (1d4, 1d4, 6d4) Save P Vicious predator, can run across the ground at great speed.
Ankylosaurus #1d4+1 AC 19 HD 9 Move 30’ Attacks 1 (3d6) Save P Armadillo-like dinosaur with club tails and armored plating. If attacked or threatened uses tail as club, otherwise docile.
Camarasaurus #2d4 AC 13 HD 20 Move 15’ Attacks 1 (3d4) Save P Swamp-dwelling Smallish (50’ long) long-necked dinosaurs. Easily spooked. Attack represents trample.
Compies #3d6 AC 14 HD 1 (1d4) Move 30’ Attacks 1 (1d3) Save P Small, carnivorous dinosaurs. Hunt in groups. 10% chance a group will confer a disease as giant rat.
Dimetrodon #1d2 AC 15 HD 3-5 Move 30’ Attacks 1 (1d10+5) Save P Sail-backed reptile ancestor of mammals. You know the one.
Dinichthys #1d4 AC 13 HD 10 Move 60’ (swim) Attacks 1 (5d4) Save P Actually giant mean fish, not dinosaurs.
Elasmosaurus #1d2 AC 12 HD 15 Move 60’ (Swim) Attacks 1 (4d6) Save P Long necked reptiles of the loch-ness type.
Mosasaurus #1d3 AC 12 HD 12 Move 10’/60’ (swim) Attacks 1 (4d8) Save P Crocodile-like marine dinosaur that goes on little flippers.
Orintholestes #2d6 AC 15 HD 2 Move 60’ Attacks 1 (2d4) Save P Man-sized predators that run incredibly fast. Feast on men and on dinosaur eggs.
Plateosaurus #5d4 AC 14 HD 8 Move 30’ Attacks 1 (2d4) Save P These are panicky herbivores that go on two legs. Attack represents trampling.
Plesiosaur #1d3 AC 12 HD 20 Move 60’ (swim) Attacks 1 (5d4) Save P large (50’ long) marine loch-ness type.
Pterosaur, Giant #1d8 AC 14 HD 6 (d10) Move 10’/60’ (fly) Attacks 1 (3d4) Save P Giant flying lizard that can carry off a large horse.
Raptor #1d6 AC 15 HD 4 (d10) Move 60’ + 5’ Jump Attacks 3 (1d2/1d2/2d4) or 1 (2d6) after jump Save P Technically deinonychus, but everybody calls them raptors. Have bright feathers.
Trachodon #2d6 AC 14 HD 12 Move 60’ Attacks 1 (1d8) Save P Duck-billed dinosaurs of the plant eating sort. Run from attack; only defense is lashing tail.