Scelidotheriidae

Casali, Daniel M, Boscaini, Alberto, Gaudin, Timothy J & Perini, Fernando A, 2022, Reassessing the phylogeny and divergence times of sloths (Mammalia: Pilosa: Folivora), exploring alternative morphological partitioning and dating models, Zoological Journal of the Linnean Society 196 (4), pp. 1505-1551 : 1523

Scelidotheriidae plus Mylodontidae

PP = 98, age = 24.11 Mya (21.90–25.95).

As stated above, the group uniting the two clades was recovered in most of our analyses, except for UN_e and some A models, in which Mylodontidae (or Mylodontinae ) is more closely related to Octomylodon , Octodontotherium and Paroctodontotherium than to Scelidotheriidae .

The clade was supported by four synapomorphies, all exclusive to BI ancestral state reconstructions: Cf1 closer to Mf1 than to anterior edge of maxilla (BI); presence of fossa anterior to Cf1 (BI); Mf1 straight in lateral view (BI); and a high and narrow braincase (BI).