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Amphicoelias

TYPE SPECIES: A. altus, Cope, 1877 [dubious name]
OTHER SPECIES: A. fragillium, Cope, 1878 [dubious name]
A. latus, Cope 1877=Camarasaurus supremus
SYNONYMS: none
CLASSIFICATION:
Ornithodira
Dinosauria
Saurischia
Sauropodomorpha
Sauropoda
Diplocimorpha
LENGTH: 20 meters (65 feet), and up to 45 meters (147 feet) in A. fragillium.
TIME PERIOD: Kimmeridgian to Tithonian (Late Jurassic)
LOCATION: Colorado, USA
ABOUT: An old story states that Amphicoelias fragillium may have been the largest dinosaur. The story speaks of a huge vertebra (2.4 meters {7.8 feet} tall) discovered in Colorado that crumbled to dust shortly after excavation. Only a drawing remains, so we will never be sure if the story is true.