The tooth crown of Iberotrygon is cuspidate, with a well-developed, high, pointed, main cusp that is inclined lingually in teeth of juveniles and adults.

These vertical ridges occasionally are amalgamated in smaller, probably juvenile teeth forming a short transversal crest similar to those found in Ptychotrygon.

The lingual face is fairly steep, and has a well-developed vertical directed uvula, above which is a well-marked central depression.

This depression is bordered dorsally by a short and slightly convex transversal crest, which is constrained to the central cusp.

[1] Teeth of Iberotrygon resemble those of Ptychotrygon, Texatrygon and Archingeayia to some extent but can easily be distinguished from those by the character combination indicated in the diagnosis.