Name: Protohadros ‭(‬first hadrosaur‭)‬.
Phonetic: Pro-toe-had-ross.
Named By: J.‭ ‬J.‭ ‬Head‭ ‬-‭ ‬1998.
Classification: Chordata,‭ ‬Reptilia,‭ ‬Dinosauria,‭ ‬Ornithischia,‭ ‬Ornithopoda,‭ ‬Iguanodontia,‭ ‬Hadrosauroidea.
Species: P.‭ ‬byrdi‭ (‬type‭)‬.
Diet: Herbivore.
Size: Holotype skull roughly about‭ ‬70‭ ‬centimetres long.‭ ‬Total body length roughly estimated at about‭ ‬7 ‬meters long.‭ ‬Special note‭*‬-Holotype individual is of a sub adult,‭ ‬fully grown adults would have been larger than this.
Known locations: USA,‭ ‬Texas‭ ‬-‭ ‬Woodbine Formation.
Time period: Cenomanian of the Cretaceous.
Fossil representation: Skull and partial post cranial remains.

       Protohadros is a genus of medium to large ornithopod dinosaur that lived in North America during the late Cretaceous.‭ ‬Protohadros means‭ ‘‬first hadrosaur‭)’‬,‭ ‬and reflects the idea at the time of its description that the genus may represent the earliest true hadrosaur in North America.‭ ‬However,‭ ‬since Protohadros has been named,‭ ‬several new discoveries‭ ‬have now discredited the idea that Protohadros was the first.‭ ‬Today Protohadros is usually classed as a hadrosauroid‭ (‬Hadrosauroidea‭)‬,‭ ‬meaning that while it was similar and a close relative of true hadrosaurid‭ (‬Hadrosauridae‭) ‬dinosaurs,‭ ‬it was still too primitive in features to be one.
       Protohadros would have been a plant eating dinosaur that mostly walked around on four legs,‭ ‬but could still rear up on just the two hind legs in order to feed on high vegetation,‭ ‬or perhaps run from predators.‭ ‬The main predatory threats to Protohadros would have been predatory dinosaurs such as tyrannosaurs and dromaeosaurs.

Further reading
-‭ ‬A primitive hadrosaur‭ (‬Dinosauria:‭ ‬Ornithischia‭) ‬from the Cenomanian of Texas and its implications for hadrosaurian phylogenetic and biogeographic histories.‭ ‬-‭ ‬Journal of Vertebrate Paleontology‭ ‬16‭(‬3,‭ ‬supplement‭)‬:‭ ‬40A.‭ ‬-‭ ‬J.‭ ‬J.‭ ‬Head‭ ‬-‭ ‬1996.
A new species of basal hadrosaurid‭ (‬Dinosauria,‭ ‬Ornithischia‭) ‬from the Cenomanian of Texas.‭ ‬-‭ ‬Journal of Vertebrate Paleontology‭ ‬18‭(‬4‭)‬:718-738‭ ‬-‭ ‬J.‭ ‬J.‭ ‬Head‭ ‬-‭ ‬1998.


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