Early Therapsids: The Thick Headed Beasts скачать в хорошем качестве

Early Therapsids: The Thick Headed Beasts

By the Middle Permian approximately 280 million years, the once dominant predatory Sphenacodontids had begun to decline. Large sailed backed carnivores such as Dimetrodon and relatives, while formerly successful, now had to compete with a new and more derived Synapsid lineage; the Therapsids. The most basal of these animals were still hypercarnivores, much like their basal Sphenacodontid cousins, although later forms were highly diverse and included purely herbivorous and omnivorous forms. Features uniting Therapsids include the presence of larger temporal fenestrae, indicating the development of more powerful jaw muscles. This paired well with the development of a more mammal-like tooth structure, which in ancestral Therapsids included snipping incisors, prominent blade-like canines and slicing molars. In addition, the limbs were held more directly beneath the body without being fully erect, while the feet were more symmetrical, giving these animals a more mammal-like gait when walking or running. 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.