Dinosaurs and Beasts of the Lost World from Dragon Magazine
by DJ HartelDragon Magazine (Per DragonDex) had these articles on dinosaurs:
| "Deadlier Dinosaurs" | David Howery | 187(14) | D&D |
| "Dinosaurs" | Stephen Inniss | 112(10) | D&D1 |
| "Dinosaurs: New Theories for Old Monsters" | Lawrence Schick | 55(12) | D&D1 |
| "Dungeons & Dinosaurs" | James Jacobs | 318(62) | D&D3 |
Here are the Prehistoric mammals:
| "Back To the Age of Mammals" | David Howery | 167(15) | D&D2 |
| "Into the Age of Mammals" | David Howery | 137(42) | D&D1 |
Other Prehistoic:
| "Creatures That Time Forgot" | Gregory W. Detwiler | 204(38) | D&D2, Amazing Engine |
| "Playing In the Paleozoic" | Gregory W. Detwiler | 176(84) | D&D2 |
Here's the breakout from Dragon (Sorry, this is a long post):
| Dinosaurs | Source | Page |
| Allosaurus | Dragon 55 | 14 |
| Deinonychus | Dragon 55 | 14 |
| Teratosaurus | Dragon 55 | 14 |
| Therezinosaurus | Dragon 55 | 14 |
| Tyrannosaurus Rex | Dragon 55 | 14 |
| Apatosaurus (Brontosaurus) | Dragon 55 | 15 |
| Brachiosaurus | Dragon 55 | 15 |
| Diplodocus | Dragon 55 | 15 |
| Plateosaurus | Dragon 55 | 16 |
| Anatosaurus (Trachodon) | Dragon 55 | 16 |
| Iguanadon | Dragon 55 | 16 |
| Parasaurolophus | Dragon 55 | 16 |
| Ankylosaurus | Dragon 55 | 16 |
| Triceratops | Dragon 55 | 16 |
| Stegosaurus | Dragon 55 | 16 |
| Pteranodon | Dragon 55 | 16 |
| Quetzalcoatlus | Dragon 55 | 72 |
| Archelon | Dragon 55 | 72 |
| Crocodile, Marine | Dragon 55 | 72 |
| Dinicthys | Dragon 55 | 72 |
| Elasmosaurus | Dragon 55 | 72 |
| lcthyosaurus | Dragon 55 | 73 |
| Tylosaurus | Dragon 55 | 73 |
| Plesiosaurus | Dragon 55 | 73 |
| Aetosaur | Dragon 112 | 14 |
| Anklyosaur | Dragon 112 | 14 |
| Carnosaur | Dragon 112 | 14 |
| Ceratopsian | Dragon 112 | 15 |
| Chelonian, Marine | Dragon 112 | 15 |
| Coelursaur | Dragon 112 | 66 |
| Crocodilian | Dragon 112 | 66 |
| Cynodant | Dragon 112 | 67 |
| Deinonychusaur | Dragon 112 | 67 |
| Dicynodont | Dragon 112 | 68 |
| Ichthyosaur | Dragon 112 | 68 |
| Labryinthodont | Dragon 112 | 69 |
| Mosasaur | Dragon 112 | 69 |
| Nothosaur | Dragon 112 | 69 |
| Ornithomimosaur | Dragon 112 | 69 |
| Ormthopod | Dragon 112 | 69 |
| Phytosaur | Dragon 112 | 69 |
| Placodont | Dragon 112 | 69 |
| Plesiosaur | Dragon 112 | 70 |
| Pliosaur | Dragon 112 | 70 |
| Prosauropod | Dragon 112 | 70 |
| Proterosuchian, Pseudochian | Dragon 112 | 70 |
| Pterosaur | Dragon 112 | 70 |
| Rhynchosaur | Dragon 112 | 71 |
| Sauropod | Dragon 112 | 71 |
| Scelidosaur | Dragon 112 | 72 |
| Stegosaur | Dragon 112 | 72 |
| Deinosuchus | Dragon 187 | 18 |
| Kronosaurus | Dragon 187 | 18 |
| Shonisaurus | Dragon 187 | 18 |
| Velociraptor | Dragon 187 | 18 |
| Compsognatus | Dragon 318 | 64 |
| Dimetrodon | Dragon 318 | 64 |
| Diplodocus | Dragon 318 | 64 |
| Giganotosaurus | Dragon 318 | 65 |
| Helicoprion | Dragon 318 | 66 |
| Liopleurodon | Dragon 318 | 66 |
| Pachycephalosaurus | Dragon 318 | 67 |
| Parasauolophus | Dragon 318 | 67 |
| Pteranodon | Dragon 318 | 68 |
| Rhamphorhynchus | Dragon 318 | 68 |
| Stegosaurus | Dragon 318 | 68 |
Issue 112 reclassifies some of the dinosaurs from the original monster manual. The article also breaks out which dinosaurs are present in which time period (Triassic, Jurassic, Cretaceous).
Here's the Prehistoric Mammals (Another long post...):
| Prehistoric Mammals | Source | Page |
| Alticamelus | Dragon 137 | 43 |
| Ambelodon | Dragon 137 | 43 |
| Arsinoitherium | Dragon 137 | 43 |
| Astrapotherium | Dragon 137 | 43 |
| Bear, Short-faced | Dragon 137 | 43 |
| Bison, Giant | Dragon 137 | 44 |
| Cat, Sabre-tooth | Dragon 137 | 44 |
| Cattle (Auroch) | Dragon 137 | 44 |
| Coryphdon | Dragon 137 | 44 |
| Deinotherium | Dragon 137 | 44 |
| Elsamotherium | Dragon 137 | 45 |
| Flightless bird, Giant | Dragon 137 | 45 |
| Gigantopithecus | Dragon 137 | 45 |
| Glyptodon | Dragon 137 | 45 |
| Horse | Dragon 137 | 45 |
| Hyaenodon | Dragon 137 | 46 |
| Lion, Cave (Spotted) | Dragon 137 | 46 |
| Macrauchenia | Dragon 137 | 46 |
| Mammoth | Dragon 137 | 46 |
| Man, Neanderthal | Dragon 137 | 46 |
| Mastodon | Dragon 137 | 47 |
| Moropus | Dragon 137 | 47 |
| Musk-Ox | Dragon 137 | 47 |
| Protoceratid | Dragon 137 | 47 |
| Rhinoceros | Dragon 137 | 47 |
| Sivatherium | Dragon 137 | 47 |
| Sloth, Ground | Dragon 137 | 47 |
| Titanothere | Dragon 137 | 48 |
| Uintatherium | Dragon 137 | 48 |
| Zeuglodon | Dragon 137 | 48 |
| Beaver, Giant | Dragon 137 | 51 |
| Goat, Giant | Dragon 137 | 51 |
| Ram, Giant | Dragon 137 | 51 |
| Stag | Dragon 137 | 51 |
| Stag, Giant | Dragon 137 | 51 |
| Agriotherium (savannah bear) | Dragon 167 | 16 |
| Amphicyon (bear dog) | Dragon 167 | 16 |
| Anancus (pike-tusked elephant) | Dragon 167 | 16 |
| Andrewsarchus (giant long-jawed hyena) | Dragon 167 | 17 |
| Bears | Dragon 167 | 17 |
| Camel, giant | Dragon 167 | 17 |
| Elephant, dwarf | Dragon 167 | 17 |
| Eucladoceros (Giant Forest Deer) | Dragon 167 | 17 |
| Hippopotamus, giant | Dragon 167 | 18 |
| Marsupials | Dragon 167 | 18 |
| Megalania (giant plains lizard) | Dragon 167 | 18 |
| Metridiochoerus (giant warthog) | Dragon 167 | 18 |
| Pelorovis (long-horned buffalo) | Dragon 167 | 19 |
| Sarkastodon (long-tailed bear) | Dragon 167 | 19 |
Paleozoic Creatures (Note: Dimetrodon and Edaphosaurus (Trilobites) belongs here, not with the dinosaurs
| Paleozoic Creatures | Source | Page |
| Opabinia, giant | Dragon 176 | 84 |
| Agnath, electric | Dragon 176 | 84 |
| Eurypterid (water scorpion) | Dragon 176 | 85 |
| Armored predatory fish | Dragon 176 | 85 |
| Eogyrinus | Dragon 176 | 85 |
| Eryops | Dragon 176 | 86 |
| Cyclotosaurus | Dragon 176 | 86 |
| Cacops | Dragon 176 | 86 |
| Platyhystrix, Giant | Dragon 176 | 86 |
| Estemennosuchus | Dragon 176 | 88 |
| Therapsids, Early | Dragon 176 | 88 |
| Therapsid, Giant | Dragon 176 | 88 |
| Erythrosuchus | Dragon 176 | 88 |
Lastly are weird "bugs" from different eras
| Weird Invertebrates | Source | Page |
| Opabinia | Dragon 204 | 39 |
| Yohoia | Dragon 204 | 39 |
| Marrella | Dragon 204 | 39 |
| Odontogriphus | Dragon 204 | 40 |
| Leanchoilia | Dragon 204 | 40 |
| Amiskwia | Dragon 204 | 41 |
| Hallucigenia | Dragon 204 | 41 |
| Hallucigenia, cave | Dragon 204 | 41 |
| Hallucigenia, acidic | Dragon 204 | 42 |
| Sanctacaris | Dragon 204 | 42 |
| Wiwaxia | Dragon 204 | 42 |
| Ottoia | Dragon 204 | 43 |
| Anomalocaris | Dragon 204 | 43 |