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Temporal range: Late Jurassic,
150 Ma
Amphicoelias altus 2006-09-28-amnh-dinos-124.jpg
Holotype vertebrae of A. altus, AMNH 5764
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Suborder: Sauropodomorpha
Clade: Sauropoda
Family: Diplodocidae
Genus: Amphicoelias
Cope, 1878
A. altus
Binomial name
Amphicoelias altus
Cope, 1878

Amphicoelias was a genus of sauropod dinosaur, which may have included the largest dinosaur ever discovered (A. fragillimus). If it truly existed, A. fragillimus would be the longest vertebrate by a considerable margin, and it would have a mass that rivals the heaviest animal known, the blue whale. However, because the only fossil evidence for its existence was lost shortly after being discovered in the 1870s, evidence survives only in drawings, and doubt has been expressed about their accuracy.

The fossil was found in the Morrison Formation.[1]

References[change | change source]

  1. Foster J. 2007. Appendix in Jurassic West: the dinosaurs of the Morrison Formation and their world. Indiana University Press. pp. 327–329.