these pseudo teeth were arranged in orderly. Repeating sets of size classes in the best-known species. A pair of short, thin. needle-like pseudo teeth flanked each of the medium-sized projections. And a pair of these three-tooth packages in turn flanked the tallest. Cone-like pseudo teeth. In life, a thin layer of the same material that sheathes the beak of modern birds probably covered the bony teeth. The overall effect was that of a menaeing grin rippling with spikes adapted to nabbing and holding onto prey.