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Dimetrodon meaning "Two-measures Tooth" is a carnivore meat-eating pelycosaur synapsid, an ancestor of the mammals, that lives during the Permain Period, long before the dinosaurs evolved. Its herbivorous cousin Edaphosaurus would appear in assorted theme park attractions.

Physical Description

The Dimetrodon has a large sail-like flap of skin along its back, dense with blood vessels. The sail was supported by long, bony spines, each of grew out of a separate spinal vertebra. The sail may have been a thermoregulatory structure, used to absorb and release heat. The sail mayhave also been used for mating and dominance rituals, and/or for making it look much larger than it was to predators. Dimetrodon had sharp teeth and clawed feet.

Appearances

Fantasia

In The Rite of Spring segment, a pair of Dimetrodon were seen, one was yawning and the other one was eating a Nothosaurus. Even though they were carnivores, they lived with herbivorous dinosaurs. One was seen when the Tyrannosaurus Rex arrived in the thunderstorm. Another Dimetrodon (or possibly the same one) was running away along with a Parasaurolophus, a Triceratops, a Dimorphodon, and 2 lizards from the Tyrannosaurus Rex hunting and chasing them.

One Dimetrodon was seen after the Stegosaurus lost the fight against the T-rex along with a group of herbivorous dinosaurs (a Parasaurolophus, a Triceratops, a Corythosaurus and a Diplodocus) looking and watching. While there were no Dimetrodon seen again at the end of the segment, they most likely became extinct in the drought of starvation, and dehydration.

The Good Dinosaur

A deleted sequence from the film would have featured a Dimetrodon snatching the newly born Arlo from the farm and running off into the woods, with Poppa Henry pursuing the beast and rescuing this son. This scene would have served as an explanation for Arlo's fears of the world outside the family farm.

Keeping with newer research speculating that Dimetrodon might have had even more mammalian traits and to give the film's "prehistoric western" universe an analog to wolves and coyotes, concept art for the sequence depicts the Dimetrodon with hair and pointy ears.

In real life

Dimetrodon (meaning "two measures of teeth") is an extinct genus of synapsid that lived during the Early Permian, around 295–272 million years ago (Ma), long before the first dinosaurs evolved. It is a member of the family Sphenacodontidae. The most prominent feature of Dimetrodon is the large sail on its back formed by elongated spines extending from the vertebrae. It walked on four legs and had a tall, curved skull with large teeth of different sizes set along the jaws. Most fossils have been found in the southwestern United States, the majority coming from a geological deposit called the Red Beds in Texas and Oklahoma. More recently, fossils have been found in Germany. Over a dozen species have been named since the genus was first described in 1878.

Gallery


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Fantasia logo
Media
FantasiaFantasia 2000House of MouseThe Sorcerer's ApprenticeNight on Bald MountainOnce Upon a TimeVideo
Video Games: FantasiaKingdom Hearts 3D: Dream Drop DistanceDisney InfinityFantasia: Music EvolvedDisney Emoji Blitz
Disney Parks
Cinderella Castle Mystery TourDisney Animation BuildingFantasia CarouselFantasia Gardens Miniature GolfFantasy GardensPrimeval WorldLe Pays des Contes de FéesMickey's PhilharMagicSorcerers of the Magic KingdomThe Sorcerer's HatVoyage to the Crystal Grotto

Entertainment: Disney Classics: The Music & The MagicFantasmic!Le Livre Magique de MickeyMickey's Gift of DreamsMickey's Magical CelebrationMickey and the Magical MapVillains Tonight!
Restaurants: Fantasia Gelati
Parade: Dreaming Up!Festival of Fantasy ParadeJubilation!Parade of the StarsSpectroMagic
Firework: Celebrate! Tokyo DisneylandWe Love Mickey!WishesWorld of Color
Halloween: Celebrate the MagicHappy Hallowishes

Characters
Fantasia: Mickey MouseSugar Plum FairiesNutcracker Suite dancersYen SidMagic BroomsTyrannosaurus RexStegosaurusTriceratopsPteranodonGryposaurusCorythosaurusApatosaurusDiplodocusOrnithomimusBrachiosaurusCeratosaurusPsittacosaurusKannemeyeriaEdmontosaurusDimorphodonParasaurolophusDimetrodonPlacochelysTylosaurusPlateosaurusAnkylosaurusCompsognathusArchaeopteryxTroodonOviraptorBacchusJacchusCentaursCentaurettesMelindaBrudusIrisMorpheusDianaZeusApolloVulcanBoreasMother PegasusFather PegasusPegasi SiblingsPeter PegasusCherubsSatyrsUnicornsMadame Upanova and her ostrichesHyacinth Hippo and her hipposElephanchine and her elephantsBen Ali Gator and his alligatorsChernabogChernabog's minions
Fantasia 2000: Donald DuckDaisy DuckColorful TrianglesBlack TrianglesHumpback WhalesSeagullsDukeRachelFlying JohnKilljoy MargaretJoeElizabethTin SoldierBallerinaJack-in-the-BoxYo Yo FlamingoSnooty FlamingosNoahSpring SpriteThe ElkThe Firebird
Deleted: OtikaSunflower
Segments
Original: Toccata and Fugue in D MinorNutcracker SuiteThe Sorcerer's ApprenticeThe Rite of SpringThe Pastoral SymphonyDance of the HoursNight on Bald Mountain/Ave Maria
Fantasia 2000: Symphony No. 5Pines of RomeRhapsody in BluePiano Concerto No. 2The Carnival of the AnimalsPomp and CircumstanceThe Firebird Suite
Locations
Yen Sid's TowerBald MountainNew York CityPrehistory
Deleted and unused concepts
Unused Fantasia SegmentsClair de LuneSunflowerOtikaEgret CoupleNaiadsDestinoThe Little MatchgirlOne by OneLorenzo
See Also
Sorcerer Hat