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Dimetrodon (/ d aɪ ˈ m iː t r ə ˌ d ɒ n / ⓘ [1] or / d aɪ ˈ m ɛ t r ə ˌ d ɒ n /; [2] lit. ' two measures of teeth ') is an extinct genus of non-mammalian synapsid belonging to the family Sphenacodontidae that lived during the Cisuralian age of the Early Permian period, around 295–272 million years ago.
A neural spine sail is a large, flattish protrusion from the back of an animal formed of a sequence of extended vertebral spinous processes and associated tissues. Such structures are comparatively rare in modern animals, but have been identified in many extinct species of amphibians and amniotes .
[10] [22] In 2012, Allain and colleagues suggested considering the high diversity in neural spine elongation observed in theropod dinosaurs, as well as histological research done on the sails of synapsids (stem mammals), Ichthyovenator ' s sinusoidal sail may have been used for courtship display or for recognising members of its own species. [1]
Platyhystrix (from Greek: πλατύς platús, 'flat' and Greek: ῠ̔́στρῐξ hústrix, 'porcupine') is an extinct temnospondyl amphibian with a distinctive sail along its back, similar to the unrelated synapsids, Dimetrodon and Edaphosaurus. It lived during the boundary between the latest Carboniferous and earliest Permian periods ...
Sails of large dinosaurs added considerably to the skin area of their bodies, with minimum increase of volume. Furthermore, if the sail was turned away from the sun, or positioned at a 90 degree angle towards a cooling wind, the animal would quite effectively cool itself in the warm climate of Cretaceous Africa. [57]
Possessed two parallel rows of backward-pointing spines on its neck that may have been covered by keratin sheaths [3] or a skin sail [4] Amargatitanis: 2007 La Amarga Formation (Early Cretaceous, Barremian to Aptian) Argentina: Originally described as a titanosaur [5] although it has since been reinterpreted as a dicraeosaurid [6] Amazonsaurus ...
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Media in category "Approved dinosaur images" The following 4 files are in this category, out of 4 total. Allosaurus Jaws Steveoc86.jpg 1,024 × 768; 280 KB.