Editing Ground sloth (section)

===Nothrotheriidae===
{{Main|Nothrotheriidae}}
Recently recognized, ground sloths of [[Nothrotheriidae]] are often associated with those of the [[Megatheriidae]], and together the two form the superfamily Megatherioidea. The most prominent members of the group are the South American genus ''[[Thalassocnus]]'', known for being aquatic, and ''[[Nothrotheriops]]'' from North America.

The last ground sloths in North America belonging to ''Nothrotheriops'' died so recently that their [[subfossil]] dung has remained undisturbed in some caves. One of the skeletons, found in a [[lava tube]] (cave) at [[Aden Crater]], adjacent to [[Kilbourne Hole]], [[New Mexico]], still had skin and hair preserved, and is now at the Yale [[Peabody Museum of Natural History|Peabody Museum]]. The largest samples of ''Nothrotheriops'' dung can be found in the collections of the Smithsonian Museum. Another ''Nothrotheriops'' was excavated at [[Shelter Cave]], also in [[Doña Ana County]], [[New Mexico]].{{citation needed|date=May 2014}}