Hedronchus sternbergii, Cope, 1876

Cope, E. D., 1876, Descriptions of some vertebrate remains from the Fort Union beds of Montana, Proceedings of the Academy of Natural Sciences of Philadelphia 28, pp. 248-261 : 259

Hedronchus sternbergii , gen. et sp. nov.

Char.Gen.-The bone on which this genus reposes has the appearance of the crown of a young tooth. Its central cavity is large and expands to the margin of the basis; its apex is unworn. It appears to be too protuberant for the position of a dermal tubercle. It may be distinguished as a short crown on a shorter slightly constricted portion or neck. The crown culminates in three crests, which together form a letter T, and which descend towards the neck. There is no investment of enamel or cement, and the material of which it is composed resembles dense bone.

Char. Specif. - The faces on each side of the stem of the T, are conicave anid divided by an oblique crest, which descencls fromnthe common apex. The other face is gently convex, and the inferior part of each of its bounding crests projects ear-like. The base is an oval.

Measurements.	M.
Elevation of crown	.006
Diameter of base longitudinal.005 transverse.004	.005 transverse.004

Discovered by Charles H. Sternberg .