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

The second metatherian is the otter-like Chibchalutra finalis. This is a stagodontid, a group of carnivorous metatherians that was common across the northern continents in the Late Cretaceous and that included the famous Didelphodon. In our timeline, the group might have endured as recently as the Eocene in South America in the form of the aptly named Eobrasilia from Brazil (gasp), representing an independent metatherian invasion from North America from the one that elad to marsupials. In this timeline, a stagodontid is definitely present in the Santa Lucia Formation when one wasn't in ours... and that's about it, as no younger stagodontids are known from this universe. Monkey's Paw indeed. Anyways, Chibchalutra finalis was an aquatic predator with a particular speciation towards molluscs and crustaceans, much like its Cretaceous predecessors. It is indeed one of the few non-allothere mammals in this formation to have a durophagous diet, albeit relying on much more crude orthal (up-and-down) chewing instead of the more efficient palinal stroke. It might also have scavenged or even ambushed small prey at the water's edge, though the abundance of crocodilians would limit this behaviour.