What is brancasaurus?

There is no known dinosaur species called "Brancasaurus." It is possible that you may be referring to "Brachiosaurus," which was a giant, long-necked dinosaur that lived during the Late Jurassic period, approximately 154 to 153 million years ago. Brachiosaurus was one of the largest dinosaurs that ever lived, reaching lengths of up to 85 feet and heights of up to 40 feet. It had a long neck, small head, and relatively short tail, with its front legs being longer than its hind legs. Brachiosaurus was an herbivorous dinosaur that likely fed on plants and trees. Its fossils have been found in North America, Africa, and Europe.