Tschopp and co-author Octávio Mateus of the Universidade Nova de Lisboa and the Museum of Lourinhã in Portugal analyzed the remains of the new dinosaur, which were excavated in 1995 by paleontologist Ben Pabst and his team. Named after Pabst, the dinosaur once lived in what are now Wyoming and Colorado.
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“The ecosystem in which G. pabsti lived was a huge alluvial plane, with meandering rivers that flowed from the south-west towards the north and north-east, into a relatively shallow inland sea, which covered parts of what are now Canada and Montana,” Tschopp explained.
The researchers determined that the dinosaur was a diplodocid sauropod, placing it among the most iconic dinosaurs and the longest creatures ever to walk the earth. Members of the family Diplodocidae (meaning “Double Beams”) include Diplodocus and Supersaurus, which may have reached lengths up to 112 feet.
These animals have a reputation for being dullard dinosaurs, since their brains were very small, particularly in relation to the rest of their bodies. The jury, though, is still out on how brain size affected their levels of intelligence.