Showing posts with label Megatherium. Show all posts
Showing posts with label Megatherium. Show all posts

THALASSOCNUS, A SLOTH ACUATIC


The most famous of the Sloths, we all know more or less, is the Megatherium. A ground sloth sturdy-looking, with more than 3000 kg (6.600 lb) . But there is another Sloths, thalassocnus, which has the peculiarity of being prehistoric and water.


The thalassocnus moved slowly and peaceful, sometimes snorkelling hunting dangerous algae and mosses with bladed teeth.

Like the Megatherium, the thalassocnus also had big, strong arms, but not to grab the branches of trees, but to cling to the seafloor, holding well to the underwater rocks while feeding.

This Sloths was not as big or heavy as its cousin the prehistoric ground sloth, in fact, could be bigger for being aquatic as it can better withstand the weight ... but no. The thalassocnus could measure about 2 meters long (40 ft.), and weighs 120 kg (264 lb.). Sometimes he could leave the water and feed on land plants, but not a large as its cousin, it could easily fall prey to predators such as Sparassodonta or Amphicyon.

Anyway, you do not think that it is rare to see a sloth in the water. Sometimes, amazon overflows, and the only way to move from tree to tree is swimming. Here you can see a sloths, swimming ... it does very well.


It existed between the Miocene and Pliocene (between 25,000 and 2.5 million years ago) in what is now known as South America.

Megatherium

I'm surprised that after writing more than 200 prehistoric animals, we still have not spoken of Megatherium, prehistoric animal that existed until 8000 years ago and, a

The Megatherium was a big herbivore, like a Sloth of the currently but giant. As a the sloths current, the Megatherium also eat the foliage. But the latter did not climb into the branches, mostly because it weighed over 5 tons (imagine an elephant up to the branch of a baobab, the same impression as the Megatherium would see in a tree). As measured 6 meters and stood on two legs reached the treetops and branches pulled down with their huge claws. Lately, is considering the option that it was an omnivorous animal, and also eating tons of leaves and branches, ever eat carrion or some unsuspecting animal ... because seeing how robust your bones and weight of this animal, we can not say it was a hunter agile, stealthy and fast.


This prehistoric animal was so large that a healthy individual was not able to kill any predator. Maybe some guy old, young or injured could fall prey to a group of giant hyenas, wolves, saber tooth or some Arctodus or cave bear.

The Megatherium, appeared on Earth 3 million years ago between the Pliocene and Pleistocene and disappeared 8,000 years ago in Central and South America. It is believed that the main cause of their extinction was the proliferation of a dangerous animal, a predator insatiable .... I speak human being.

In this video we will see that this prehistoric animal was not as shy as its relative the current lazy ...



What you do not know what is below. ????



 Well, it is a cave that was excavated by a megaterio and served as den / shelter . This in particular is about 200 m long and was excavated about 20,000 years ago .



Glyptodon



The glyptodon, always connected with existing armadillos, a native of America. The glyptodon measured about 3 m and weighed about 1.4 t, being equivalent in size and shape to a Volkswagen Beetle. It was a herbivore and, by its constitution, it is assumed that it was not very agile. His defense against predators was based on its rigid shell. Different species are distinguished by different types of shells. Many of these shells remained empty throughout the plains of Uruguay and Argentina will likely serve as a refuge for early humans in the region.

The glyptodon is part of the group of placental mammals known as Xenarthra. This order of mammals includes armadillos, as well as several extinct species.

The glyptodon emerged in the Pliocene in South America, migrating north after, when the Isthmus of Panama joined the Americas. It is believed that they were hunted by human populations in their environment, to use the carcasses of dead animals as a refuge from hostile environments. Became extinct about 10,000 to 8,500 years.



The glyptodontes oldest known lived in the early Tertiary and were not very large. After appearing species were becoming larger, until in the Quaternary, when there were also megatherium, there were real giants who roamed in what is now Patagonia Argentina. They had a great half-shell shaped eggshell consists of many hexagonal shaped plates, round, etc.., He was locked below the animal's body with a sturdy skeleton, had a long tail, some species, finished off with barbed thick and compact.

Smilodon


The Smilodon are among the largest felids, the heaviest specimens of this massively built carnivore may have exceeded 400 kg (880 lb).


A Smilodon had a short tail, powerful legs, muscular neck and long canines. Despite being around the same size as a tiger or lion, Smilodon was more robustly built, comparable to a bear.
It shown to scale to demonstrate the compact muscular buildA fully-grown Smilodon weighed approximately 55 to 360 kg (120 to 790 lb), depending on species.



Limbs
Smilodon had relatively shorter and more massive limbs than other felines. It had well developed flexors and extensors in its forepaws,[citation needed] which enabled it to pull down large prey. The back limbs had powerfully built adductor muscles which might have helped the cat's stability when wrestling with prey. Its claws were retractable.



Teeth and jaws

They are the longest canines of the saber-toothed cats at about 28 cm (11 in) long in the largest species Smilodon populator. They were probably built more for stabbing than slashing. Despite being more powerfully built than other large cats, Smilodon actually had a weaker bite. Modern big cats have more pronounced zygomatic arches, while Smilodon had smaller zygomatic arches which restricted the thickness and therefore power of the temporalis muscles, and thus reduced Smilodon’s bite force. Analysis of its narrow jaws indicates that it could produce a bite only a third as strong as that of a lion.There seems to a be a general rule that the saber-toothed cats with the largest canines had proportionally weaker bites. However, analyses of canine bending strength (the ability of the canine teeth to resist bending forces without breaking) and bite forces indicate that saber-toothed cats' teeth were stronger relative to the bite force than those of modern "big cats". In addition, Smilodon could open its jaws 120 degrees, whereas the lion can only open its jaws to 65 degrees.



Smilodon probably preyed on a wide variety of large game including bison, Megatherium, Aurochs, deer, American camels, horses and . As it is known for the saber-toothed cat Homotherium, Smilodon might have killed also juvenile mastodons and mammoths.

Smilodon called sabre-toothed cat or sabre-toothed tiger, is an extinct genus of the subfamily machairodontine saber-toothed cats endemic to North America and South America living from the Early Pleistocene through Lujanian stage of the Pleistocene epoch (1.8 mya—10,000 years ago), existing for approximately 1.790 milion years.
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