Sawfish

Outgrowths on the rostrum of sawfish told about the origin of teeth

(ORDO NEWS) — Scientists studied the teeth on the rostrum of the fossil sawfish Ischyrhiza mira, which are modified scales. It turned out that the surface of these teeth is much more complicated than the rest of the scales on the body of the fish and rather resembles the coating of a shark’s tooth. The results of the study confirmed the hypothesis about the origin of teeth from scales. Until…