Dimetrodon and the Permian Sailbacks скачать в хорошем качестве

Dimetrodon and the Permian Sailbacks

During the early Permian, the Synapsids continued their rise to dominance in an increasingly arid world. As detailed in the pervious video in this series, these animals diverged from the reptilian Sauropsids during the second half of the Carboniferous period, producing a number of basal groups such as the pin headed Casesaurs and the carnivorous Ophiacodontids. These were gradually replaced by more derived groups as the Permian progressed, with the sail-backed Edaphosaurids moving into the large herbivore niche. The superficially similar Sphenacodontids, such as the famous genus Dimetrodon, became highly successful predators and hunted their close relatives. With semi-erect postures and cutting, serrated teeth, the Sphenacodontids still largely resembled reptiles in appearance, although probably possessed smooth glandular skin lacking in scales. Why these families developed elaborate sails is still debated, but a role in sexual display seems most likely. Both of these groups would die out by the Middle Permian, with their niches taken by the more mammal-like Therapsids. https://www.deviantart.com/drpolaris/   / drpolaris   All copyrighted images/footage/music is protected under Fair Use for reasons of criticism, commentary, social satire, and education. All copyrighted images belong to their respected owners. Please notify me if I neglected to credit your work in the video. All copyrighted footage and images in this video are protected under FAIR USE for reasons of Commentary, Education, Criticism, Parody, and Social Satire. Copyright Disclaimer under section 107 of the Copyright Act 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Educational use tips the balance in favour of fair use. This means, copyrighted images can be displayed, even without the owner’s permission. If I neglected to give the copyright owners credit, please inform me and I will give you the appropriate credit. All video/game/image/music content is recorded and edited under fair use rights for reasons of commentary, education, and social satire.