Palaeoscincus (meaning "ancient skink" in Greek) is a genus of ankylosaurian dinosaur based on teeth discovered in Montana. Like several other dinosaur genera named by Joseph Leidy ("Deinodon", "Thespesius", and "Trachodon"), it is an historically important genus with a convoluted taxonomy that has been all but abandoned by modern dinosaur paleontologists. Because of its wide use in the early 20th century, "Palaeoscincus" is a somewhat famous dinosaur, often through illustrations of an animal with the armor of "Edmontonia" and the tail club of an ankylosaurid.