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Brontosaurus has long been considered a junior synonym of Apatosaurus
There are also serrations on the mesial carina but partially obscured by the matrix
Araucarioxylon arizonicum is an extinct species of conifer that is the state fossil of Arizona
The tooth is slender in cross-section and the serrations are smaller than other Morrison carnivorous dinosaurs
about 25 feet
Eocene Green River Juvenile Stingray VF-GRP2-16-023 Ammonite Psiloceras Brontosaurus has long been consideredHeliobatis radians Green River Formation Middle Eocene Lincoln County, Wyoming This is a very fine example of a juvenile of the species from the Fossil Butte Member of the Green River Formation. The stingray is 24 cm long. This specimen has excellent preservation and detail for this locality. This is a beautifully preserved example and many details are excellent. The specimen is repaired and has restoration on the fractures and several areas on the