Thalassocnini

PP = 100, age = 7.67 Mya (5.60–9.67).

This clade was recovered in all analyses performed in this study, except, as stated above, in par_IW5, in which Aymaratherium and Thalassocnus are successive sister taxa to Megatheriini.

Thalassocnini was supported by five synapomorphies (one for both methods and four exclusively for BI): horizontal ramus of mandible length greater than or equal to two times the depth, but less than three times (BI); straight anterior edge of symphysis, in lateral view (BI); lesser tubercle of humerus less proximally projected than greater tubercle (BI); presence of entepicondylar foramen of humerus; and confluence of sustentacular facet and cuboid surface of calcaneus (BI).