Apatosaurus "Apatosaurus" may have been more solitary than other Morrison Formation dinosaurs. Fossils of the genus have only been found in the upper levels of the formation. Those of "Apatosaurus ajax" are known exclusively from the upper Brushy Basin Member, about 152–151 mya. "A.louisae" fossils are rare, known only from one site in the upper Brushy Basin Member; they date to the late Kimmeridgian stage, about 151mya. Additional "Apatosaurus" remains are known from similarly aged or slightly younger rocks, but they have not been identified as any particular species, and thus may instead belong to "Brontosaurus". The Morrison Formation records a
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