Tuesday, 3 December 2013

Sonorasaurus thompsoni

In 1994 Richard Thompson, a geology student at the University of Arizona stumbled across several bone fragments in the Sonoran Desert of Arizona. The specimen turned out to be a completely new type of brachiosaurid dinosaur and the first known sauropod from the Middle Cretaceous of North America. Gouge marks discovered on the bones of Sonorasaurus and a tooth discovered with the bones belonging to Acrocanthosaurus suggests it was preyed upon.

Sonorasaurus thompsoni
Ratkevich, 1998
Meaning of generic name
"Sonora lizard" named after the place of discovery, Sonoran Desert
Meaning of specific name
Named after Richard Thompson, he discovered the specimen in 1995
Body Length: 55 ft (16.7 m)?
Partial skeleton including a complete hind foot (pes), numerous vertebrae, humerus, pelvic remains, and a complete crushed skull.
Age and Distribution
Horizon: Turney Ranch Formation, Lower-Upper Cretaceous Albian-Cenomanian Locality: Chihuahua Desert, Sonoran Desert (southeast of Tucson), Arizona, U.S.A.
Dinosauria Saurischia Sauropodomorpha Sauropoda Macronaria Brachiosauridae
Further Reading
Ratkevich, R (1998). "New Cretaceous brachiosaurid dinosaur, Sonorasaurus thompsoni gen et sp. nov, from Arizona." Arizona-Nevada Academy of Science 31: 71-82.

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