#koparion

Source: http://pixgood.com/koparion.html

Name: Koparion douglassi

Name Meaning: Small Surgical Knife

First Described: 1994

Described By: Chure

Classification: Dinosauria, Saurischia, Eusaurischia, Theropoda, Neotheropoda, Averostra, Tetanurae, Orionides, Avetheropoda, Coelurosauria, Tyrannoraptora, Maniraptoriformes, Maniraptora, Pennaraptora, Paraves, Eumaniraptora, Averaptora, Troodontidae

A troodontid (possibly) known from the Jurassic Period, this little guy is only known from a single isolated tooth. It was found in the Kimmeridgian age of the Late Jurassic, about 151 million years ago. Specifically, it was fround near Dinosaur National Monument in Uintah County, Utah. It is typically regarded as a troodontid and would be one of the oldest known if so. The tooth was 1.9 millimeters long and had a very wide base that was asymmetrical. 

Sources: 

http://en.wikipedia.org/wiki/Koparion

http://www.prehistoric-wildlife.com/species/k/koparion.html