The first half of the Miocene saw the rapid spread and diversification of Proboscideans. As their ancestral African continent pushed northwards and collided with Eurasia, these trunked mammals ventured out across new lands, becoming well established in North America by the Middle Miocene. The most derived clade of Proboscideans were the Elephantoids, being the only forms to survive into modern times. Stegodontids were a basal lineage of Elephantoids that were native to Africa and Asia, with the highly successful genus Stegodon producing up to 13 species. Some of these, such as S. zdanskyi, were enormous animals up to 13.7 feet tall and 12.7 tonnes in weight, while many insular forms that dwelt in Japan, the Philippines and Flores were far smaller. Stegodon persisted into the Late Pleistocene in China.
Another Elephantoid group, the 'Tetralophodont Gomphotheres' were also widespread at around the same time as the Stegodontids. Once thought to be Gomphotheres, recent studies have found them to be close relatives of modern elephants. Some genera, such as Anancus, possessed highly elongated tusks up to 14 feet long. Generally forest dwelling animals, these 'Gomphotheres' died out in Afro-Eurasia roughly 2 million years ago but persisted in North America until about 300,000 years ago. It is possible that the extinction of both groups was caused by climate change during the second half of the Pleistocene, reducing suitable savannah forest habitats, although this remains debated.
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.
1 янв 2022
