Adalatherium

Adalatherium (meaning "crazy beast") is an extinct gondwanatherian that lived on Madagascar during the Cretaceous and early Paleocene period, during the Maastrichtian and Danian. The discovery of the first nearly-complete "Adalatherium" skeleton from the Maevarano Formation was announced in April 2020. 
While typical mammals found from that era were around the size of a mouse, the skeleton found — thought to merely be a juvenile — was 60 cm (2 ft) long. It is depicted in reconstructions as being built somewhat like a badger. Its skeleton is the most complete of any Southern Hemisphere Mesozoic mammal. Additionally, the front of the skull contains more foramina than any known mammal.