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Sonorasaurus (Dmitri Bogdanov)


Sonorasaurus (Greek for "Sonora Desert lizard"); pronounced so-NOR-ah-SORE-us


Woodlands of North America

Historical Period:

Middle Cretaceous (100 million years ago)

Size and Weight:

About 50 feet long and 10-15 tons



Distinguishing Characteristics:

Extremely long neck; long forelimbs and short hind limbs


About Sonorasaurus:

There wasn't much special about the appearance of Sonorasaurus, which adhered to the basic body plan of Brachiosaurus-like sauropods: an extremely long neck and a thick trunk supported by significantly longer front than back legs. What makes Sonorosaurus interesting is that its remains date from middle Cretaceous North America (about 100 million years ago), a relatively sparse stretch of time when it comes to sauropod fossils. By the way, the euphonious name of this dinosaur derives from Arizona's Sonora Desert.

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