Perinatal specimens of Saurolophus angustirostris (MPC-D100/764).

Calcified cartilage (close-up of Fig 10). Calcified cartilage preserved as small transparent and translucent globules with sizes in the order of a few tens of micrometers. Orange-brown matter is hematite dispersed within the cones of calcified cartilage, but especially concentrated at the contact surface between the calcified cartilage and the bone tissue. Inset: location of the close-up within the bone.