article_snippet.sent: Emanuel Tschopp, a paleontologist at the Nova University of Lisbon, Portugal, led this latest study, which took five years and included visits to 20 museums in Europe and the United States to collect data.
article_snippet.sent: By examining "500 anatomical traits," Tschopp said Tschopp was able to "reconstruct the family tree" of Diplodocids --
article_snippet.sent: Tschopp "looked at every single specimen," according to Gauthier and "noted Gauthier characteristics," plugging data into an algorithm that revealed "five species in the group of Diplodocids."  
highlights_snippet.sent: Study took five years and involved visits to 20 museums worldwide .