of the bone was roughened save for the top portion surrounding the nostril, which is also the thickest part of the bone. A piece of the dentary likely comes from the rear third of the jaw, judging by the presence of the coronoid process of the mandible. It preserves a row of teeth, containing six tooth sockets with three fully erupted teeth, that was offset towards the midline of the animal from the centre of the bone. Postcranial material As is typical of centrosaurines, the scapula forms about half of the glenoid articulation. Like other ceratopsids, the acromion was prominent and very roughened. On the bottom edge of the bone, there is an abrupt angle of 25° at the thickest point in the bone instead of a gradual curve. The top end of the scapula was widened to form a paddle-like shape, more prominently so than other centrosaurines. As in other ceratopsians, the ilium was strongly deflected, with the deflected portion of the bone being straight when viewed from the top. The robustly shafted femur is straightened and minimally curved as in Avaceratops, although part of this may be an artifact of crushing. On the femur, the femoral head is rounded and globe-shaped, the greater trochanter is separated from and rises above the level of the femoral head, and the fourth trochanter forms a prominent crest like in other centrosaurines. The cnemial crest of the tibia is expanded and is about 40% of the width of the expanded end of the bone, which is similar to Avaceratops. A dorsal vertebra, which likely comes from near the neck-torso transition judging by the large neural canal, has slightly pinched edges, with a depression on either side at the level of the neural canal. The articular ends of the vertebra are rounded and concave on both sides (or amphicoelous). The neural canal itself was about 25% taller than it was wide. The neural arch, which encloses the neural canal, is almost entirely fused to the rest of the bone; however, a small trace of the suture is slightly visible in some places. Classification A phylogenetic analysis conducted in 2016 found that Yehuecauhceratops occupied a fairly basal position in the Centrosaurinae, being in the same clade as Avaceratops and Nasutoceratops (a clade subsequently named Nasutoceratopsini). Indeed, Yehuecauhceratops and Avaceratops share a number of characters. The strict consensus of the phylogenetic trees recovered by the