https://multituberculateearth.wordp.....cia-formation/
https://sites.google.com/view/allot.....ucia-formation

The third mesungulatid genera is the most charismatic of megafauna. Closely related to Patagonian taxa like Peligrotherium tropicalis, Baroauchenia is the present culmination of their trend towards larger body sizes, becoming some of the largest land animals of the Paleocene at weights of over 3 tonnes and heights of four meters. Several species are known across South America, Antarctica and Australia, which B. canifacis representing the northernmost extreme of the genus' range. These giant herbivores are worthy successors to the sauropods of old, having developed long necks to browse above their gondwanathere competition. Nonetheless, they possess more robust jaws than their dinosaur counterparts, hence a considerably broad diet of pretty much any vegetation above the reach of their competitors, as well as lower browse, aquatic plants and tubbers dug up by powerful claws. Unlike allotheres and their palinal strokes, meridiolestidans use a side-to-side chewing mechanism much like our ungulates, and unlike sudamericids they have lophodont rather than hypsodont teeth; both of these suggest a prefference for softer plant matter than the contemporary Glyptoguy and Hosca. B. canifascis is at any rate the most common mammal fossil, owning both to its large size and gregarious habits, with dozens of specimens often grouped together. The presence of such a large sized herbivore likely altered the biome of this timeline's Santa Lucia Formation, resulting in open canopies and clearings; this perhaps explains a local flora more similar to that of the Cretaceous than our Paleocene. Males seem to have been slightly larger than females and are overall much more rare, suggesting that like other larger herbivores females lived in herds alongside their young while adult males were either solitary or formed bands at the fringes. While this depiction is conservative and depicts the animal with a full pelage, the tropical latitudes could mean that B. canifacis was naked; we may never know. What we do know that that its long neck, tail and ears likely played a role in cooling the body, and while not specialised to an aquatic ecology it is likely that herds spend daylight hours bathing and playing in the water, further explaining why these animals are such common finds.