[3] Nematherium Analcitherium Neonematherium Sibyllotherium Proscelidodon Catonyx Scelidotherium Valgipes Pseudoprepotherium Brievabradys Octodontotherium Paroctodontotherium Octomylodon Urumacotherium Baraguatherium Octodontobradys Mylodon Thinobadistes Lestodon Lestobradys Bolivartherium Simomylodon Pleurolestodon Glossotherium Paramylodon The following cladogram of the Mylodontidae is based on Boscaini et al. 2019, showing the position of Bolivartherium.

[4] Urumacotherium Pseudoprepotherium Paroctodontotherium Octodontotherium Brievabradys Lestodon Bolivartherium Thinobadistes Sphenotherus Lestobradys Pleurolestodon Glossotheridium Simomylodon Kiyumylodon Mylodon Paramylodon Glossotherium The most extensive fossil material to date belongs to the Urumaco sequence, a complex depositional unit that is predominantly exposed in the approximately 36,000 km² large Falcón Basin in the Venezuelan state of Falcón.

In addition, there are also reptiles such as turtles, crocodilians and isolated snakes, as well as mammals appearing with rodents, South American ungulates, manatees, and minor jointed animals among others.

The secondary articulated animals show a high diversity, which almost reaches that of the contemporary fauna of southern South America in the Pampas region or in Mesopotamia.

As a special circumstance of taphonomy, the frequent tradition of limb elements in sloths is to be evaluated, however, from Bolivartherium also documented remains of the skull.