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

One of the strangest leonardids is Xenotamandua allocaellus, a mymercophage similar to an anteater and indeed having convergently acquired many post-cranial adaptations like large clawed forelimbs, xenarthrous vertebrae and a heavy tail to balance while walking bipedally, but retained a very conservative skull, only slightly longer and with more spaced teeth than Leonardus itself. This has lead to differing interpretations that it is either part of a lineage dating deep into the Cretaceous or a more recent innovation. Not helping is that its phylogenetic placement is mangled by this mosaic of primitive and advanced features; sometimes it is the most basal Cenozoic leonardid known, sometimes it is part of a clade leading to the flying allochiropterids. Connecting it to other ant-eating meridiolestidans of the Cenozoic of Australia and South America has proven fruitless, so it seems it was one of a kind, either the last representative of a long-lasting lineage or a single bizarre offshoot. Specialised distally broad epipubic bones suggest that the tongue anchored here, thus spanning the torso like in pangolins.