Catopsbaatar
Catopsbaatar is a genus of multituberculate, an extinct order of rodent-like mammals. It lived in what is now Mongolia during the late Campanian age of the Late Cretaceous Period, about 72 million years ago. The first fossils were collected in the early 1970s, and the animal was named as a new species of the genus "Djadochtatherium " in 1974, "D. catopsaloides". The specific name refers to the animal's similarity to the genus "Catopsalis". The species was moved to the genus "Catopsalis" in 1979, and received its own genus ("Catopsbaatar", Greek and Mongolian for "visible hero") in 1994. Five skulls, one molar, and one skeleton with a skull are known; the latter is the genus' most complete specimen. "Catopsbaatar" was a member of the family Djadochtatheriidae.
Paleontology in Pennsylvania
One of the first major fossil finds of the 20th century in Pennsylvania was the 1902 discovery of dinosaur tracks at a fisher's Quarry near Graterford in Montgomery County. Another prominent early 1900s discovery was a lower jaw from the amphibian "Calamops" was discovered in the Late Triassic Stockton Formation at Holicong. This is the oldest vertebrate fossil from either the Hartford or Newark Basins. In 1923 the Reading Railroad tunnel at Gwynned was converted into an open cut, exposing many Late Triassic fossils. Later, in 1933, two "Anchisauripus" tracks were discovered near Yocumtown in York County. Dinosaur tracks dating back to the Late Triassic were discovered near the Gettysburg battle sites in 1933.