Abydosaurus

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Abydosaurus
Temporal range:
Ma
Holotype skull
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: Sauropodomorpha
Clade: Sauropoda
Clade: Macronaria
Family: Brachiosauridae
Genus: Abydosaurus
Chure et al., 2010
Type species
Abydosaurus mcintoshi
Chure et al., 2010

Abydosaurus (meaning "

Lower Cretaceous rocks of northeastern Utah, United States
.

Discovery

Restoration of the head and neck

Abydosaurus is one of the few sauropods known from skull material, with the first described complete skull for a Cretaceous sauropod from the Americas.[1] It is also notable for its narrow teeth, as earlier brachiosaurids had broader teeth.[1]

Abydosaurus is based on the

Mussentuchit Member of the Cedar Mountain Formation, near the old visitor center of Dinosaur National Monument. Zircons from mudstones beneath the bone-bearing sandstone indicate the age of the sandstone and its contained bones is less than 104.46 ± 0.95 million years, in the Albian stage of the Early Cretaceous.[1]

Abydosaurus was named in 2010 by Daniel Chure and colleagues. The genus name is a reference to

Green River. The type species is A. mcintoshi in honor of John S. ("Jack") McIntosh,[1] Professor of Physics, Emeritus, Wesleyan University, and his contributions to Dinosaur National Monument and the study of sauropod dinosaurs.[1][2][3]

Description

Although Abydosaurus lived some 50 million years after Giraffatitan, the skulls of these two genera are similar except for the narrower, sharper teeth and smaller nose of Abydosaurus. Abydosaurus can be differentiated from all other sauropods, including Giraffatitan, by subtle features of the nasal and maxillary bones, its relatively small external nares (nostrils), and some features of the teeth.[1] In 2012 Thomas Holtz gave a length of 18.3 metres (60 ft).[4]

References

  1. ^
    PMID 20179896
    .
  2. ^ Liu, P.X. (26 February 2010). "Recently Discovered Dinosaur Named After Retired Professor". The Wesleyan Argus. Wesleyan University. Archived from the original on 9 March 2010. Retrieved 1 March 2010.
  3. ^ "Wesleyan University Physics Department People". Wesleyan University. Archived from the original on 2010-01-26. Retrieved 1 March 2010.
  4. ^ Holtz, Thomas R. (2012). "Holtz's genus list" (PDF).

External links