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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 sphenacodontid synapsid tetrapods that lived during the Cisuralian age of the Early Permian period, around 295–272 million years ago.
The teeth of Dimetrodon borealis are long, recurved, and distinctively teardrop-shaped, being widest at the middle rather than the base. The teardrop shape of the teeth is an indication that Dimetrodon borealis belongs to the family Sphenacodontidae.
The biggest carnivorous synapsid of Early Permian was Dimetrodon, which could reach 4.6 m (15 ft) and 250 kg (550 lb). [8] The largest members of the genus Dimetrodon were also the world's first fully terrestrial apex predators. [9]
Walking with Monsters – Life Before Dinosaurs, marketed as Before the Dinosaurs – Walking with Monsters in North America, is a 2005 three-part nature documentary television miniseries created by Impossible Pictures and produced by the BBC Studios Science Unit, [2] the Discovery Channel, ProSieben and France 3. [3]
When Deep Blue was filmed in Mexico a few years before, she was seen calmly swimming around the shark cage and only taking curious bites at the cage; she did not attack Padillo, who had been on top of the cage and exposed. The diver was even able to touch her fin, stating he was trying to push her away from the cage. [10] [11]
As a guideline, nekton are larger and tend to swim largely at biologically high Reynolds numbers (>10 3 and up beyond 10 9), where inertial flows are the rule, and eddies (vortices) are easily shed. Plankton, on the other hand, are small and, if they swim at all, do so at biologically low Reynolds numbers (0.001 to 10), where the viscous ...
A trio of three juvenile Diplocaulus in a burrow of eight (plus one juvenile Eryops) were found to have been partially eaten by the sail-backed synapsid Dimetrodon, which likely unearthed the amphibians during a drought. One of the three was killed with a bite to the head, taking part of its skull and portions of the brain, a fatal injury that ...
A great cormorant swimming. Aquatic locomotion or swimming is biologically propelled motion through a liquid medium. The simplest propulsive systems are composed of cilia and flagella. Swimming has evolved a number of times in a range of organisms including arthropods, fish, molluscs, amphibians, reptiles, birds, and mammals.