Exactas y Naturales Divulgación 


Palaeontologists from Argentina and Ecuador presented a “South American Yeti” of more than 10,000 years ago

Researchers described a giant sloth that lived in the mountains and inter-Andean valleys of Ecuador more than 2,500 meters above sea level. This "South American Yeti" weighed about a ton, had large claws, and its muzzle was adapted to withstand altitude and low temperatures.

Agustina Lima (CTyS-UNLaM) - The skulls that allowed the identification of this extinct beast were found scattered in various mountainous areas between central and northern Ecuador. In addition, there is enough material to rebuild the almost complete body of this giant animal that lived between 40,000 and 10,000 years before the present.

Dr. Luciano Brambilla, a researcher at the Centre for Interdisciplinary Studies at the University of Rosario (CEI-UNR) and CONICET, confirmed CTyS-UNLaM Disclosure Agency that "this new species has previously unknown characteristics, especially in its wide snout, adapted so that this animal can withstand the low temperatures and the mountain climate ”.

It had large claws on its back and front legs, although the team of Argentine and Ecuadorian palaeontologists indicates that it will have to be patient to know more specific details of this "Yeti" of the inter-Andean valleys, since the investigation is just beginning.

Regarding the environment in which this animal lived, the Ecuadorian palaeontologist José Luis Román Carrión of the Polytechnic School of Quito asserted to the CTyS-UNLaM Disclosure Agency that more than 10,000 years ago, in the mountainous sites and in the valleys where the fossils were found, predominated grasslands, but the climate was about six or seven degrees colder than at present and the ecosystem had glacial lagoons”.

Over more than 100 years, fossil remains of this giant beast were found between 2,500 and 3,100 in altitude from north to central Ecuador, although it has now been re-affirmed as a unique species of terrestrial sloth that lived exclusively on high ground.

In 2008, at a site located in the city of Quito, were found three examples of adults and one juvenile of this South American "Yeti", which are part of the study recently published in the scientific Journal of Vertebrate Paleontology.

"The finding of three examples in the same place makes us think that these animals lived in herds, a completely new fact for all terrestrial sloths," said Román Carrión, lead author of the research.

In this way, the "Yeti" found in the heights of Ecuador, does not correspond to the imaginary of a lone abominable snowman. In difference from the idea of a reckless and dangerous beast, these giant sloths were herbivorous animals and, if they ever crossed paths with humans more than 10,000 years ago, it could have served as food for those distant ancestors.

The "South American Yeti" has a name: Oreomylodon wegneri

This species of giant sloth adapted to the cold and to the heights was named as Oreomylodon wegneri, which means mountain mylodon. The remains are preserved in the Natural History Museum of Quito.

Dr. Román Carrión described "to withstand the low temperatures, these animals have developed a wider snout than the other species of giant sloths known so far, which allowed them to moisten the dry air they inhaled and protect the humidity by exhaling the air".

Possibly, the Oreomylodon wegneri had a hyper developed sense of smell, which could affect the interaction between males and females as well as the delimitation of their territories.

This South American "Yeti", with large claws -which he used to get his food- in an upright position could exceed two meters high and on four legs was similar in size to a small car.

About 10,000 years ago, at the end of the so-called Ice Age, the ecosystem began to change completely and these giant and other mega-mammals such as mastodons, horses, and saber teeth tigers became extinct.

Fecha de Publicación: 2020-03-12
Fuente: Agencia CTyS-UNLaM