This was a odd-looking cover taxon
in the Journal of Vertebrate Paleontology back in 1997 (Fig. 1).
Eurygenium latirostris (Ameghino 1894. E. pacegnum Shokey 1997; late Oligocene, 25 mya; 76 cm in length) was described by Shockey as close to the origins of Toxodontidae. That is confirmed here in the large reptile tree (LRT (1028 taxa), but no prior authors nested these taxa with wombats and marsupials as they do here. Most authors considered both taxa notoungulates, a taxon that has been dispersed and essentially invalidated here in the LRT.
Eurygenium is also close to Pyrotherium, and is from the same beds.
By the way…
Wombats wear their pouches backwards, so if the baby wants to look outside the pouch, it sees a short thick tail wagging back and forth. Quite a sight, I’m sure, for baby and all outside observers.
Shockey BJ 1997. Two new notoungulates (Family Notohippidae) from the Sall Beds of Bolivia (Deseadan: late Oligocene) : systematics and functional morphology. Journal of Vertebrate Paleontology 17(3):584-599.