Now extinct, land-dwelling reptiles of the Mesozoic Era. The name means "terrible lizard".
Mesozoic terrestrial animal with an erect gait
(1) A reptile- or bird-like animal with an upright posture that spent most (perhaps all) of its life on land and lived only during the Mesozoic Period. (2) An animal that had a minimum of the following synapomorphies: three or more sacral vertebrae, shoulder girdle with backward-facing (caudally pointing) glenoid, asymmetrical manus with less than or equal to three phalanges on digit IV, acetabulum with open medial wall, tibia with cnemial crest, astragalus with a long ascending process that fits into the anterior part of the tibia, sigmoidally shaped third metatarsal, postfrontal absent, humerus with long deltopectoral crest, and femur with ball-like head on proximal end. (3) The closest common ancestor to Triceratops and modern birds.
Extinct ancient land animals that lived on earth between 240 and 65 million years ago, a period of 175 million years. (The term dinosaur is Greek for "Terrible Lizard" although now scientists believe they are only distantly related to reptiles.)
Group of animals that have bird-like and lizard-like features (Mesozoic).
Any reptile of the subclass Archosauria distinguished from other reptiles especially by features of the pelvic bones. Dinosaurs were carnivorous and herbivorous. They also did not fly or swim.They died out at the end of the Cretaceous Period 65 million years ago.
Any reptile of the subclass Archosauria distinguished from other reptiles by the features of the pelvic bones. May be herbivores, carnivores, bipedal, or quadripedal and range from the Triassic period to the Cretaceous period.
Any of various extinct, often gigantic reptiles.
any of numerous extinct terrestrial reptiles of the Mesozoic era
an extinct form of reptile
a reptile with an upright stance and is extinct
a special type of land-living reptile with an erect gait; a member of the Archosaur group that lived between 224 million and 65 million years ago
Any reptile of the subclass Archosauria distinguished from other reptiles especially by features of the pelvic bones. Dinosaurs were carnivorous or herbivorous, bipedal or quadrupedal, land-dwelling, and of moderate to very large size. Range, Triassic to Cretaceous.
One of a large group of reptiles that lived millions of years ago. All dinosaurs lived on land.
reptiles of the Mesozoic Era, 225 to 65 million years ago.
any of a large group if extinct terrestrial or amphibious reptiles that were chiefly herbivorous, had usually very long limbs and tails, and walked on two or four feet. [AHDOS
Dinosaurs were land-dwelling reptiles that walked with an erect stance during the Mesozoic Era. Their unique hip structure caused their legs to stick out from under their bodies, and not sprawl out from the side (like other reptiles). They are extinct, but they evolved into the birds. The word dinosaur ( meaning "fearfully great lizard") was coined by Sir Richard Owen in 1841. The first dinosaur in space was Maiasaura peeblesorum (a duck-billed dinosaur). A piece of bone from a baby Maiasaura and a Maiasaura eggshell were taken into space by astronaut Loren Acton on an 8-day NASA mission (Spacelab 2) in 1985. The historic Maiasaura fossils now reside at the Museum of the Rockies in Bozeman, Montana, USA.
Dinosaurs were vertebrate animals that dominated terrestrial ecosystems for over 160 million years, first appearing approximately 230 million years ago. At the end of the Cretaceous Period, approximately 65 million years ago, a catastrophic extinction event ended dinosaurs' dominance on land. At least one significant group of dinosaurs has survived until the present day; taxonomists consider modern birds to be the direct descendants of theropod dinosaurs.
Dinosaur (originally named Countdown to Extinction) is a thrill ride at Disney's Animal Kingdom in Walt Disney World, Lake Buena Vista, Florida. It is a rough dark ride. Guests are taken through primeval scenes populated with audio-animatronic dinosaurs.
(Note: For the actual-life group of extinct reptiles, see: Dinosaur)