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• Dimetrodon abstract "Dimetrodon (/daɪˈmɛtrədɒn/; meaning "two measures of teeth") is an extinct genus of synapsid that lived during the Early Permian, around 295–272 million years ago (Ma). 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. Dimetrodon is often mistaken as a dinosaur or as a contemporary of dinosaurs in popular culture, but it went extinct around 40 million years before the appearance of the first dinosaur in the Triassic period. Generally reptile-like in appearance and physiology, Dimetrodon is nevertheless more closely related to mammals than it is to any living reptilian group, though it is not a direct ancestor of any mammals. Dimetrodon belongs to a group traditionally called "mammal-like reptiles", more recently termed "stem-mammals" or "non-mammalian synapsids" because many vertebrate paleontologists today group Dimetrodon together with mammals in an evolutionary group or clade called Synapsida while dinosaurs go together with living reptiles and birds in a separate group, Sauropsida. A single large opening on either side of the back of the skull links Dimetrodon with mammals and distinguishes it from most of the earliest sauropsids, which either lack openings or have two openings. Features such as ridges on the inside of the nasal cavity and a ridge at the back of the lower jaw are thought to be part of an evolutionary progression from early tetrapods (four-limbed vertebrates) to mammals. Dimetrodon was probably one of the top predators in Early Permian ecosystems, feeding on fish and tetrapods, including reptiles as well as amphibians. Smaller Dimetrodon species may have had different ecological roles. The sail of Dimetrodon may have been used to stabilize its spine or to heat and cool its body as a form of thermoregulation. Some recent studies argue that the sail would have been ineffective at removing heat from the body, and was more likely used in sexual display.".
• Dimetrodon thumbnail Dimetrodon_skeleton.jpg?width=300.
• Dimetrodon wikiPageExternalLink Dimetrodon.
• Dimetrodon wikiPageExternalLink pelycosaurs.html.
• Dimetrodon wikiPageID "515343".
• Dimetrodon wikiPageRevisionID "606638882".
• Dimetrodon align "right".
• Dimetrodon authority 1878_in_paleontology.
• Dimetrodon authority Edward_Drinker_Cope.
• Dimetrodon direction "vertical".
• Dimetrodon footer "Bones of the skull of Dimetrodon".
• Dimetrodon footer "Dimetrodon may have been sexually dimorphic; the mounted skeleton AMNH 4636 may represent the male type, and the skeleton in the University of Michigan Museum of Natural History may represent the female type".
• Dimetrodon fossilRange "Early Permian,".
• Dimetrodon hasPhotoCollection Dimetrodon.
• Dimetrodon image "Dimetrodon incisivus Exhibit Museum of Natural History.JPG".
• Dimetrodon image "Dimetrodon limbatus AMNH 4636.JPG".
• Dimetrodon image "Dimetrodon skull dorsal.svg".
• Dimetrodon image "Dimetrodon skull lateral.svg".
• Dimetrodon image "Dimetrodon skull occipital.svg".
• Dimetrodon image "Dimetrodon skull ventral.svg".
• Dimetrodon imageCaption "Mounted skeleton of Dimetrodon grandis".
• Dimetrodon imageWidth "250".
• Dimetrodon subdivision "See below".
• Dimetrodon subdivisionRanks "Species".
• Dimetrodon synonyms "Bathyglyptus (Case, 1911)".
• Dimetrodon synonyms "Embolophorus (Cope, 1878)".
• Dimetrodon synonyms "Theropleura (Cope, 1878)".
• Dimetrodon typeSpecies "Dimetrodon limbatus".
• Dimetrodon width "(200 * 3072 / 2304) round 0".
• Dimetrodon width "(200 * 3264 / 2448) round 0".
• Dimetrodon width "250".
• Dimetrodon subject Category:Permian_synapsids.
• Dimetrodon subject Category:Prehistoric_synapsids_of_Europe.
• Dimetrodon subject Category:Prehistoric_synapsids_of_North_America.
• Dimetrodon subject Category:Sphenacodonts.
• Dimetrodon subject Category:Transitional_fossils.
• Dimetrodon type Animal.
• Dimetrodon type BiologicalLivingObject.
• Dimetrodon type EukaryoticCell.
• Dimetrodon type Reptile.
• Dimetrodon comment "Dimetrodon (/daɪˈmɛtrədɒn/; meaning "two measures of teeth") is an extinct genus of synapsid that lived during the Early Permian, around 295–272 million years ago (Ma). 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.".
• Dimetrodon label "Dimetrodon".
• Dimetrodon label "Dimetrodon".
• Dimetrodon label "Dimetrodon".
• Dimetrodon label "Dimetrodon".
• Dimetrodon label "Dimetrodon".
• Dimetrodon label "Dimetrodon".
• Dimetrodon label "Dimetrodon".
• Dimetrodon label "Dimétrodon".
• Dimetrodon label "Диметродоны".
• Dimetrodon label "ديميترودون".
• Dimetrodon label "ディメトロドン".
• Dimetrodon label "异齿龙".
• Dimetrodon sameAs Dimetrodon.
• Dimetrodon sameAs Dimetrodon.
• Dimetrodon sameAs Διμετρόδοντας.
• Dimetrodon sameAs Dimetrodon.
• Dimetrodon sameAs Dimetrodon.
• Dimetrodon sameAs Dimétrodon.
• Dimetrodon sameAs Dimetrodon.
• Dimetrodon sameAs Dimetrodon.
• Dimetrodon sameAs ディメトロドン.
• Dimetrodon sameAs 디메트로돈.
• Dimetrodon sameAs Dimetrodon.
• Dimetrodon sameAs Dimetrodon.
• Dimetrodon sameAs Dimetrodon.
• Dimetrodon sameAs m.02kgj_.
• Dimetrodon sameAs Q130869.
• Dimetrodon sameAs Q130869.
• Dimetrodon wasDerivedFrom Dimetrodon?oldid=606638882.
• Dimetrodon depiction Dimetrodon_skeleton.jpg.
• Dimetrodon isPrimaryTopicOf Dimetrodon.