Triodontella lajonquierei is a species of beetle of the family Scarabaeidae. It is found in France, Portugal and Spain.
They are very similar to similar to Triodontella aquila. The head is densely punctured, but more indistinctly than in T. aquila and the pronotum has a very characteristic shape. The sides are rounded in the anterior third, but perfectly straight, not sinute, and parallel in the posterior half. The elytra have stronger punctation than T. aquila.