Apatosaurus which Marsh had described "Brontosaurus". Most of the skeleton was found, and after comparison with both "Brontosaurus" and "Apatosaurus ajax", Riggs realized that the holotype of "A.ajax" was immature, and thus the features distinguishing the genera were not valid. Since "Apatosaurus" was the earlier name, "Brontosaurus" should be considered a junior synonym of "Apatosaurus". Because of this, Riggs recombined "Brontosaurus excelsus" as "Apatosaurus excelsus". Based on comparisons with other species proposed to belong to "Apatosaurus", Riggs also determined that the Field Columbian Museum specimen was likely most similar to "A.excelsus". Despite Riggs' publication, Henry Fairfield Osborn, who was a strong
Daffy Duck and the Dinosaur Daffy Duck and the Dinosaur Daffy Duck and the Dinosaur is a 1939 "Merrie Melodies" animated cartoon short supervised by Chuck Jones and produced by Leon Schlesinger Productions for Warner Bros. Pictures. The cartoon is notably the first Daffy Duck cartoon supervised by Jones. "Daffy Duck and the Dinosaur" is set in the Stone Age and features Daffy Duck, a caveman named Casper (a caricature of Jack Benny), and his pet "Apatosaurus", Fido. As usual, Mel Blanc provides the voice of Daffy here, while Casper is performed by Jack Lescoulie. This is the last cartoon with the "Vitaphone" intro, which