What is "galeamopus"

Galeamopus is a genus of herbivorous diplodocid sauropod dinosaurs. It contains one known species, Galeamopus hayi, known from the Late Jurassic lower Morrison Formation ( Kimmeridgian age, about 155 million years ago) of Wyoming, United States. It is known from one of the most well preserved diplodocid fossils, a nearly complete skeleton with associated skull. An additional specimen may represent a distinct species.