The holotype teeth of Siluosaurus were recovered during the 1992 Sino-Japanese Silk Road Dinosaur Expedition in the lower portion of the Xinminbao Group. One tooth, seven millimetres long, was from the upper beak (premaxilla), and the other, 3.7 millimetres high, was from the cheek region of the upper jaw (maxilla).
During the 1992 Sino-Japanese Silk Road Dinosaur Expedition, the holotype teeth of Siluosaurus were found in the lower portion of the Xinminbao Group. One tooth, seven millimeters long, came from the upper beak (premaxilla), while the other, 3.7 millimeters high, was from the cheek region of the upper jaw (maxilla).