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meaning: "Thunder thigh"
Named By: Michael P. Taylor, Matthew J. Wedel & Richard L. Cifelli in 2011
Time Period: Lower Cretaceous, Aptian-Albian
Location: USA, Utah, Cedar Mountain Formation
Size: Approximately 14 meters long
Diet: unavailable
Fossil(s): Two fragmentary specimens, representing two animals of different ages
Classification: | Chordata | Reptilia | Dinosauria | Saurischia | Sauropoda | Macronaria | Camarasauromorpha |

Brontomerus (from Greek bronte meaning "thunder", and meros meaning "thigh") is a possibly dubious genus of camarasauromorph sauropod which lived during the early Cretaceous (Aptian or Albian age, approximately 110 million years ago). It was named in 2011 and the type species is Brontomerus mcintoshi. It is probably a fairly basal camarasauromorph, though the taxon is difficult to resolve due to incompleteness of the material. It is most remarkable for its unusual hipbones, which would have supported the largest thigh muscles, proportionally, of any known sauropod. The specific name is in honor of physicist and North American sauropod guru John "Jack" Stanton McIntosh.

Read more about Brontomerus at Wikipedia
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