 Pachycormids might represent an early branch of Teleostei, the group most modern bony fishes belong to; in that case "Leedsichthys" is the largest known teleost fish.During the 1880s, the gentleman farmer Alfred Nicholson Leeds collected large fish fossils from loam pits near Peterborough, England.In May 1886 these were inspected by John Whitaker Hulke, who in 1887 partially reported them as the back plates of the stegosaurian "Omosaurus".