Abydosaurus

Abydosaurus Temporal range: Early Cretaceous,
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Superorder:	Dinosauria
Order:	Saurischia
Suborder:	Sauropodomorpha
Infraorder:	Sauropoda
Family:	Brachiosauridae
Genus:	Abydosaurus Chure et al., 2010
Species
A. mcintoshi Chure et al., 2010 (type)

Abydosaurus (meaning "Abydos lizard") is a genus of brachiosaurid sauropod dinosaur known from skull and postcranial material found in upper Lower Cretaceous rocks of northeastern Utah, United States. It is of interest because it is one of the few sauropods known from skull material, with the first described complete skull for a Cretaceous sauropod from the Americas. It is also notable for its narrow teeth, as earlier brachiosaurids had broader teeth.

Abydosaurus is based on DINO 16488, a nearly complete skull and lower jaws with the first four neck vertebrae. Abundant skull and postcranial bones were found at the same site, including partial skulls from three additional individuals, a partial hip and associated tail vertebrae, a shoulder blade, an upper arm bone, and hand bones. These fossils were found in a sandstone bed at the base of the Mussentuchit Member of the Cedar Mountain Formation, near the old Visitor Center of Dinosaur National Monument. Zircons in the sandstone and underlying mudstone indicate an age of 104.46 ± 0.95 million years old, in the Albian stage of the Early Cretaceous.

Abydosaurus was named in 2010 by Daniel Chure and colleagues. The genus name is a reference to Egyptian mythology: Abydos is the Greek name for a city on the Nile where the head and neck of Osiris were buried, while the holotype of Abydosaurus consists of a head and neck found in rocks overlooking the Green River. The type species is A. mcintoshi in honor of John S. (“Jack”) McIntosh and his contributions to the Monument and the study of sauropod dinosaurs.

External links

• New dinosaur discovered head first, for a change.

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