Petrodus patelliformis M'Coy 1848.
Single 3D dermal denticle from a primitive Shark on a cube of grey limestone. Lovely detail under magnification.
Carboniferous, Visean, Brigantian, Eyam Limestone Formation.
Steeplehouse Quarry. Wirksworth, Derbyshire
Matrix. $ x 3.8 x 3.2 cm.
