Ugrosaurus

ugly lizard

• ugro- · English (informal/colloquial) · ugly
• saurus · Greek · lizard

The name combines the informal English word "ugro" (from "ugly") with the Greek "sauros," meaning lizard, yielding "ugly lizard." It was applied informally to reflect the robust, heavily built appearance of the animal. The name was coined by Cobabe and Fastovsky in 1987 for fragmentary ceratopsian material from Montana.

Named by

Cobabe and Fastovsky

Year named

1987

Period

Late Cretaceous

Stage

Maastrichtian

Found in

Hell Creek Formation, Montana, USA

Ugrosaurus olsoni was named from a fragmentary nasal bone of a ceratopsian dinosaur. It is widely regarded as a nomen dubium because the material is too incomplete to reliably diagnose a distinct genus. Some researchers have suggested the material may belong to Triceratops, but this has not been formally settled. It is not considered a valid genus by most modern authorities.