shoulders, similar in relative size to the shoulder spikes of Gigantspinosaurus. The shoulder spine has a large flat trapezoidal base; after a sudden kink, a more narrow straight shaft, flat but with a protruding ridge on the outer side, projects to behind from the lower base edge. The bony plates on its back were rather small and relatively low, triangular or fin-shaped. The largest plates, about fifteen centimetres high and with a base length of twenty centimetres, are similar in profile to those of Hesperosaurus, though of a more reduced relative size. They were not "splates", i.e. featuring a thickened middle section, but almost uniformly flat, with a rough and veined surface. Phylogeny Zhu placed Yingshanosaurus, within the Stegosauridae, in the Stegosaurinae. See also Timeline of stegosaur research References External links "Yingshanosaurus" at the Natural History Museum Late Jurassic dinosaurs of Asia Stegosaurs Fossil taxa described in 1994 Paleontology in Sichuan Ornithischian genera