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A number of kill sites are known for ground sloths in the Americas, these include Campo Laborde in the Pampas of Argentina, where an individual of Megatherium americanum was butchered at the edge of a swamp, dating to approximately 12,600 years Before Present (BP), [63] with another potential Megatherium kill site being Arroyo Seco 2 in the ...
Within the Megatheriidae there are two (possibly three) subfamilies; the Megatheriinae and the Planopsinae. The phylogenetically older group is represented by the Planopsinae from the Lower and Middle Miocene.
The group includes the heavily built Megatherium (given its name 'great beast' by Georges Cuvier [4]) and Eremotherium. An early genus that was originally considered a megatheriid, the more slightly built Hapalops, reached a length of about 1.2 metres (3.9 ft). The nothrotheres have recently been placed in their own family, Nothrotheriidae. [5]
Nothrotheriidae is a family of extinct ground sloths that lived from approximately 17.5 mya—10,000 years ago, existing for approximately 7] Previously placed within the tribe Nothrotheriini or subfamily Nothrotheriinae within Megatheriidae, they are now usually placed in their own family, Nothrotheriidae. [8]
Nothrotheriops is a genus of Pleistocene ground sloth found in North America, from what is now central Mexico to the southern United States. [1] This genus of bear-sized xenarthran was related to the much larger, and far more famous Megatherium, although it has recently been placed in a different family, Nothrotheriidae. [2]
Promegatherium ("before Megatherium") is a genus of prehistoric xenarthrans that lived in Argentina, during the Late Miocene.This genus is regarded as closely related to the later, and more famous genus, Megatherium, hence the reference in the name.
Eremotherium laurillardi skeleton at the Smithsonian National Museum of Natural History. Eremotherium was slightly larger than the closely related Megatherium in size, reaching an overall length of 6 metres (20 ft) and a height of 2 metres (6.6 ft) while on all fours, possibly up to 4 metres (13 ft) when it reared up on its hind legs. [25]
Also humans are much physically less massive than Megatherium, which explains why their limb bones are much less robust. Hemiauchenia 21:51, 20 May 2024 (UTC) I'm not sure it's the right question: the bones are large and look massive to us, the structural need and Megatherium#Ecology are hard to tell. One source is cited for the statement that ...