Editing Mylodon (section)

=== Postcrania ===
Postcranial skeletons are far rarer in ''Mylodon'' than in the other large mylodontid sloths. As a result, the skeleton is less well documented. Only individual elements of the spine, such as the atlas and various thoracic vertebrae, have been described. The humerus was massive and extremely long at 46 to 48&nbsp;cm. The joint head, the diameter of which was over 10&nbsp;cm, stood out due to its hemispherical, but laterally somewhat flattened shape. A distinct deltopectoral ridge ran down the shaft, which acted as an anchor point for the shoulder muscles. As with many ground sloths, the lower end of the joint extended far and brought it here to a width of almost 26&nbsp;cm. In part, this was caused by a massive internal epicondyle. The articular surfaces (capitulum and trochlea) were almost perpendicular to each other and did not form such an obtuse angle as in ''Glossotherium''. The cubit was built gracefully. Their length was around 37&nbsp;cm. The olecranon, i.e. the upper articular process, took up about 8.1&nbsp;cm of it, which corresponds to about 22% of the total length and is significantly less than in comparison with ''Glossotherium'' and ''Lestodon''. It was laterally narrowed, which is also found in ''Paramylodon''. The spoke largely resembled that of Glossotherium and was compact and straight built with a length of about 30&nbsp;cm. The head was oval in shape with a prominent lip. The pelvis was extremely expansive and 114&nbsp;cm wide between the two iliac bones. The thigh bone measured between 55 and 59&nbsp;cm in length. It was typical of ground sloths, being flat in shape. Its width decreased significantly on the shaft, the lowest value was reached just below the midpoint. Here the width was about 18&nbsp;cm, the thickness about 7.5&nbsp;cm. The joint ends, on the other hand, were markedly wider, around 30&nbsp;cm at the knee end and around 26&nbsp;cm at the foot end. The thighbone reached the shin with only about half of its length, a characteristic of mylodonts. This bone, too, was clearly flat with a thickness that was only half the value of the width at the shaft. The fibula is so far only fragmented. It was drawn in on the shaft and widened at the joint ends, with the upper joint end showing more pronounced curves than in ''Glossotherium''.<ref name="kraglievich1934">Lucas Kraglievich: Contribución al conocimiento de ''Mylodon darwini'' Owen y especies afines. Revista del Museo de La Plata 34, 1934, pp. 255–292</ref><ref name="mcafee2016">{{cite journal |last1=McAfee |first1=Robert K. |title=Description of New Postcranial Elements of Mylodon darwinii Owen 1839 (Mammalia: Pilosa: Mylodontinae), and Functional Morphology of the Forelimb |journal=Ameghiniana |date=August 2016 |volume=53 |issue=4 |pages=418–443 |doi=10.5710/AMGH.24.02.2016.2950 |s2cid=88450788 }}</ref><ref name="haroetal2017">{{cite journal |last1=Haro |first1=José A. |last2=Tauber |first2=Adan A. |last3=Krapovickas |first3=Jerónimo M. |title=Thoracic member (pectoral girdle and forelimb) bones of Mylodon darwinii Owen (Xenarthra, Mylodontidae) from the Late Pleistocene of Central Argentina and their phylogenetic implications |journal=PalZ |date=September 2017 |volume=91 |issue=3 |pages=439–457 |doi=10.1007/s12542-017-0350-z |bibcode=2017PalZ...91..439H |s2cid=90593541 }}</ref>

The hand comprised a total of five digits (I to V), whereby the metacarpal bone was fused with the large polygonal bone on the first digit. This created the so-called Metacrapal Carpal Complex (MCC for short), which is typical for many ground sloths. As a special feature of the wrist, the pea bone was clearly flat, its shape resembled that of ''Glossotherium'', but differed from the corresponding bone of other Mylodonts with spherical, walnut-like or a pyramidal shape. The fourth digit had formed the longest metacarpal bone, while that of the fifth was only slightly shorter. The respective bones measured there around 12.5 and 10.7&nbsp;cm in length. As with ''Glossotherium'' and ''Paramylodon'', only the three inner digits were probably clawed, but only of the second digit have all bone elements been documented. The metacarpal bone was 7.8&nbsp;cm long and was built very gracefully. The first phalanx was extremely short and only about 2.5&nbsp;cm long, the second was about 4.2&nbsp;cm long and the third at least 11.5&nbsp;cm. It was tubular and went forward into an extension on which the claw rested. The first phalanges of the two outer digits were significantly reduced in length. Only individual root bones of the foot, such as the talus, are present.<ref name="mcafee2016" />