Richardoestesia gilmorei, R. isosceles
Name: Richardoestesia gilmorei
Name Meaning: Richard Estes
First Described: 1990
Described By: Currie, Rigby, & Sioan
Classification: Dinosauria, Saurischia, Theropoda, Neotheropoda, Averostra, Tetanurae, Orionides, Avetheropoda, Coelurosauria
Richardoestesia was a medium sized carnivore from North America. It has been found in a variety of formations: Judith River Formation, Horseshoe Canyon Formation, and Scollard Formation from Alberta Canada; Lance Formation from Wyoming, Aguja Formation from Texas, and Cedar Mountain Formation from Utah. It lived in the Campanian or Barremian age of the Late Cretaceous, about 76.5-66 million years ago. It is known from lots of teeth and some lower jaw bones. There is very little known about it given these sparse remains. And, given that the teeth have been found in a variety of locations and time periods, it is also doubtful that they all belong to the same genus or species. What we do know is that it had slender, long jaws with lots of small, finely serrated teeth. It was probably a small theropod and also probably was in troodontidae or dromaeosauridae, but it can only firmly be placed in coelurosauria.
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