zygomaticus minor muscle
Facial muscle attached to the modiolus, corner (angle) of the mouth, and zygomatic bone. This muscle is ventral to the zygomaticus minor and dorsal to the platysma muscle. In many mammals this muscle also has an attachment to the cartilage of the external ear, in which case it is called the auriculolabialis inferior. See Diogo 2008; Diogo et al., 2009; Burrows et al.., 2011., also DuBrul, 1980.