Myogale sphincter subsp. colli

WHIDDEN, HOWARD P., 2000, Comparative Myology of Moles and the Phylogeny of the Talpidae (Mammalia, Lipotyphla), American Museum Novitates 3294, pp. 1-53 : 11

M. sphincter colli profundus, pars intermedia ventralis

ORIGIN: From the deep surface of M. platysma myoides .

INSERTION: In the skin of the throat region, where it decussates with its antimere.

REMARKS: This muscle has the same general form in Condylura , Desmana , Neurotrichus , Parascalops , Scalopus , Scapanus , Scaptonyx , Talpa , Uropsilus , and Urotrichus . As noted above, this muscle appears to be a continuation of the pars intermedia dorsalis that has crossed through M. platysma myoides .

Snout Muscles

The next five facial muscles have elongate, fusiform bellies and long tendons extending out into the snout, and can be considered snout muscles. Although they are found in all lipotyphlan insectivores (Dobson, 1882– 1890; Butler, 1988; Whidden, 1996), the homologies relative to other mammals are unclear. I follow Dobson (1882–1890) and Gaughran (1954) in naming these muscles, but I do not mean to imply homology to the muscles of the same name in humans. The snout muscles are innervated by a branch of the facial nerve that wraps around the anteroventral side of the auditory tube. In shrews and moles they run along the zygomatic arch and insert into the snout via long tendons. Meinertz (1978a & 1978b) considered these five muscles to be parts of an M. dilator nasi.