Pappotherium is an extinct genus of mammals from the Albian (early Cretaceous) of Texas (USA), known from a fossilized maxilla fragment bearing two tribosphenic molars, discovered within the Glen Rose Formation near Decatur, Wise County, Texas.The fossil was discovered by Bob H. Slaughter within some deposits dating back to 112.6 – 109 million years ago. On the basis of the morphology of the molars' cusps, in 1965 Slaughter established the new genus Pappotherium and the new species P.