User blog comment:Adsper/All Possible Mobs/@comment-27083689-20151025102821/@comment-6040659-20151025221524

Nah. It's more like this:

Invertebrates:
 * Anomalocaris *
 * Olenoides *
 * Pterygotus *
 * Arthropleura *
 * Meganeura *
 * Asteroceras *

Fish:
 * Dunkleosteus *
 * Eusthenopteron *
 * Megalodon ***

Amphibians:
 * Ichthyostega *

Non-Dinosaurian Reptiles:
 * Ichthyosaurus *
 * Dimorphodon *
 * Plesiosaurus **
 * Liopleurodon *
 * Rhamphorhynchus **
 * Pterodactylus *
 * Kronosaurus *
 * Sarcosuchus *
 * Tylosaurus *
 * Elasmosaurus **
 * Pteranodon ***
 * Archelon *
 * Mosasaurus *
 * Quetzalcoatlus *

Mammals:
 * Edaphosaurus *
 * Dimetrodon **
 * Thrinaxodon *
 * Andrewsarchus *
 * Basilosaurus *
 * Paraceratherium *
 * Australopithecus *
 * Megaloceros *
 * Woolly Rhinoceros *
 * Megatherium *
 * Glyptodon *
 * Smilodon ***
 * Neanderthal ***
 * Woolly Mammoth ***

Dinosaurs:
 * Coelophysis *
 * Plateosaurus *
 * Dilophosaurus **
 * Megalosaurus *
 * Compsognathus **
 * Stegosaurus ***
 * Allosaurus **
 * Apatosaurus ***
 * Brontosaurus ***
 * Diplodocus **
 * Brachiosaurus **
 * Iguanodon **
 * Baryonyx *
 * Hypsilophodon *
 * Utahraptor ***
 * Microraptor *
 * Deinonychus ***
 * Spinosaurus **
 * Giganotosaurus *
 * Argentinosaurus *
 * Protoceratops *
 * Velociraptor ***
 * Oviraptor *
 * Corythosaurus *
 * Maiasaura *
 * Parasaurolophus **
 * Edmontosaurus **
 * Ornithomimus **
 * Struthiomimus **
 * Gallimimus **
 * Pachycephalosaurus **
 * Ankylosaurus **
 * Triceratops ***
 * Tyrannosaurus ***

Birds:
 * Archaeopteryx **
 * Ichthyornis *
 * Hesperornis *
 * Gastornis *
 * Dodo ***