Reassessing the phylogeny and divergence times of sloths (Mammalia: Pilosa: Folivora), exploring alternative morphological partitioning and dating models Author Casali, Daniel M Author Boscaini, Alberto Author Gaudin, Timothy J Author Perini, Fernando A text Zoological Journal of the Linnean Society 2022 2022-12-01 196 4 1505 1551 https://academic.oup.com/zoolinnean/article/196/4/1505/6617197 journal article 10.1093/zoolinnean/zlac041 0024-4082 7381236 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).