sentences:  Hulke suggested that "this head and the lower jaw both belonged to one individual" as both the same dimensions and were discovered in close proximity in a reef exposed at low water in Kimmeridge Bay.Some material was destroyed due to pyrite decay while the isolated bone fragment referred to as the "upper maxilla" has never been figured and cannot be located.Richard Owen erected the genus "Plesiosuchus" for "S. manselii" in 1884 as he considered it to be more similar morphologically to extant crocodylians than to "Steneosaurus".