Dimetrodon limbatus, a prehistoric animal.

AMNIOTE • AMPHIBIA • AMPHIBIAN • AMPHIBIOUS • ANIMAL MOUTH • ANIMAL TEETH • ANIMAL THEMES • ANIMAL • ANIMALS IN THE WILD • APEX PREDATOR • ARTWORK • BACKBONE • BRANCH • CARNASSIAL • CARNIVORE • COLOR IMAGE • COLOUR IMAGE • CRAWLING • CREATURE • DAY • DIMETRODON LIMBATUS • DIMETRODON • DINOSAUR • DINOSAURS • ENVIRONMENT • EVOLUTION • EXTINCT • FANG • FIERCE • FORT • HORIZONTAL • ILLUSTRATION TECHNIQUE • ILLUSTRATION • JAW • LAND • LATERAL VIEW • MOUTH OPEN • NATURAL HISTORY • NATURAL SCIENCES • NATURE STUDY • NO PEOPLE • ONE ANIMAL • OPEN MOUTH • OPEN-MOUTHED • OUTCROP • OUTDOOR • OUTDOORS • OUTSIDE • PAINTING • PALAEONTOLOGY • PALAEOZOOLOGY • PALEOBIOLOGY • PALEONTOLOGY • PALEOZOIC ERA • PALEOZOOLOGY • PAST • PERMIAN • PREDATOR • PREHISTORIC ERA • PRIMITIVE • QUADRUPED • REPTIL • REPTILE • REPTILES • ROCK • RUGGED • SCIENCE: EVOLUTION • SCISSOR TOOTH • SECTORIAL • SHARP • SIDE VIEW • SPECIES • SPINE • STRONG • SYNAPSID • TOUGHNESS • VERTEBRATE • WILDERNESS • WILDLIFE • WITHOUT PEOPLE • WOOD • ZOOLOGY