Age - Eocene Occurrence - Uncommon*
I’ve always considered the teeth of Jaeckelotodus
trigonalis to be striking. Relatively robust when compared to the
other sand tigers these teeth have a distinctive triangular shape. The
crown is moderately broad with heavy looking roots, a strong lingual
protuberance and a shallow
but distinct nutrient grove. Two or more cusplets are present; the primary is a broad
triangle shape, with the secondary being diminished and attached to the
primary. The basal portion of the cutting edge may show signs of
serrations*. Some forms of
cuspidata and J.
trigonalis can de difficult to distinguish apart.
The serrations at the base of the crown may be very
distinct (left) or
The lateral tooth on the left has three cusplets, the anterior tooth on
¹ Kent, W.B, 1994. Fossil Sharks of the Chesapeake Bay Region, Egan Rees & Boyd, Inc., 46pp.