Name: Sonorasaurus ‭(‬Sonora Desert lizard‭)‬.
Phonetic: So-nor-ah-sore-us.
Named By: R.‭ ‬Ratkevich‭ ‬-‭ ‬1998.
Classification: Chordata,‭ ‬Reptilia,‭ ‬Dinosauria,‭ ‬Saurischia,‭ ‬Sauropoda,‭ ‬Titanosauriformes,‭ ‬Brachiosauridae.
Species: S.‭ ‬thompsoni‭ (‬type‭)‬.
Diet: Herbivore.
Size: About‭ ‬15‭ ‬meters long.
Known locations: USA,‭ ‬Arizona.
Time period: Albian/Cenomanian of the Cretaceous.
Fossil representation: Partial remains.

       Sonorasaurus may look like an atypical brachiosaurid dinosaur‭ (‬as in similar to the famous Brachiosaurus‭)‬,‭ ‬but the genus actually represents the first known example of a brachiosaurid dinosaur in North America during the Cretaceous,‭ ‬specifically around the early/late Cretaceous boundary.‭ ‬This is yet further evidence that counters the now outdated theory that the sauropods/titanosaurs died out in North America by the Cretaceous period.‭ ‬Granted they do not seem to be as common as they were during the late Jurassic,‭ ‬but they were certainly not absent.
       Sonorasaurus was named after the Sonora Desert of Arizona,‭ ‬while the type species name,‭ ‬S.‭ ‬thompsoni is named in honour of Richard Thompson who as a geology student first discovered the Sonorasaurus holotype fossils back in‭ ‬1995.

Further reading
-‭ ‬New Cretaceous brachiosaurid dinosaur,‭ ‬Sonorasaurus thompsoni gen et sp.‭ ‬nov,‭ ‬from Arizona.‭ ‬-‭ ‬Arizona-Nevada Academy of Science‭ ‬31‭; ‬71-82.‭ ‬-‭ ‬R.‭ ‬Ratkevich‭ ‬-‭ ‬1998.
- Anatomy, systematics, paleoenvironment, growth, and age of the sauropod dinosaur Sonorasaurus thompsoni from the Cretaceous of Arizona, USA. - Journal of Paleontology. 90 (1): 102–132. - M. D. D'Emic, B. Z. Foreman & N. A. Jud - 2016.


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