During the Paleocene, many of the major modern mammal groups familiar to us today emerged after the K-PG mass extinction. One such lineage were the Perissodactyls, the so called odd toed ungulates. Only three families have survived into modern times, with these being the horses, tapirs and the subject of today’s video, the rhinos. Basal members of all three of these groups would have looked very similar in life, being small forest dwelling browsers that would have resembled trunkless tapirs. The first Rhinocerotoids were dog-sized agile animals such as Hyrachyus, while the gracile Hyracodontids were successful pony-like runners that thrived in the Eocene and Oligocene.
Meanwhile, the Amynodontids were larger and bulkier; some forms were tapir-like and possessed short trunks, while genera such as Metamynodon were semi-aquatic and superficially resembled modern hippos. The largest of all these early Rhinoceratoids were the Paraceratheriids, which filled a high browsing niche similar to giraffes or sauropod dinosaurs. Basal Eocene forms reached the size of horses, while Oligocene genera became truly enormous. The successful Paraceratherium was among the most massive terrestrial mammals of all time, weighing between 15-20 tonnes. All of these groups died out by the end of the Oligocene, due to a combination of climate change and competition with Proboscideans, leaving only the more familiar Rhinocerotids to persist into the Miocene and beyond.
www.deviantart...
/ 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.
Негізгі бет The Early Evolution of Rhinos
No video
Пікірлер: 114