attached to dorsal to muscles innervated by the facial nerve modiolus orbicularis oris muscle skin of body anterior root of zygomatic arch zygomaticus minor auriculolabialis superior musculus quadratus labii superioris, zygomatic head UBERON_0008594 square muscle of the upper lip, zygomatic head musculus zygomaticus minor Facial muscle attached to the orbicularis oris muscle, anterior root of the zygomatic arch (zygomatic bone or maxilla), and skin in the region of the caudal border of the orbicularis oculi muscle. The muscle is often described as having two heads, one attached to the maxilla and the other attached to the skin overlying the orbicularis oculi. In many mammals this muscle also has an attachment to the cartilage of the external ear, in which case it is called the auriculolabialis superior. See Diogo 2008; Diogo et al., 2009; Burrows et al.., 2011., also DuBrul, 1980. zygomaticus major